Long-Term Debt - Narrative (Details)

v3.8.0.1

Long-Term Debt - Narrative (Details)										1 Months Ended				12 Months Ended
	Dec. 12, 2017	Sep. 01, 2017 USD ($)	Aug. 04, 2017 USD ($)	Jul. 27, 2017 USD ($)	Jan. 23, 2017 USD ($) $ / shares	Jan. 20, 2017 USD ($)	Nov. 08, 2016 USD ($)	Aug. 17, 2016 USD ($) $ / shares shares	Apr. 15, 2016 shares	Oct. 31, 2016 USD ($)	Oct. 31, 2015 USD ($)	Oct. 31, 2014 USD ($)	May 31, 2013 USD ($)	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jul. 31, 2017 USD ($)	May 31, 2016 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($) $ / shares	May 31, 2014 USD ($)	Oct. 17, 2013 USD ($)	Aug. 31, 2013 USD ($)	Aug. 31, 2012 USD ($)
Debt Instrument [Line Items]
Long-term Debt														$ 13,954,000,000	$ 8,018,000,000
Debt, Current														$ 768,000,000	5,000,000
Warrant expiration period														81 days
Borrowings of debt														$ 6,697,000,000	2,745,000,000	$ 2,213,000,000
Repayments of Long-term Debt														5,107,000,000	1,749,000,000	$ 1,196,000,000
Loss on extinguishment of debt														(48,000,000)	(24,000,000)
1.375% Cash Convertible Senior Notes Due 2023
Debt Instrument [Line Items]
Debt face amount																							$ 1,000,000,000
Debt Instrument, Interest Rate, Stated Percentage																							1.375%
Debt instrument interest rate																							1.375%
$500 Million Margin Loan due 2018
Debt Instrument [Line Items]
Debt Instrument, Collateral Amount														57,000,000
$750 million margin loan due 2018
Debt Instrument [Line Items]
Debt, Current														$ 750,000,000
Debt Instrument, Description of Variable Rate Basis										LIBOR	LIBOR
Effective interest rate														3.24%
Debt instrument, unused borrowing capacity, fee, percent										0.75%
$750 million margin loan due 2018 | LIBOR
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate										1.75%
$750 million margin loan due 2018 | Term Loan
Debt Instrument [Line Items]
Debt face amount										$ 250,000,000	$ 250,000,000
$750 million margin loan due 2018 | Revolving Credit Facility
Debt Instrument [Line Items]
Debt face amount											$ 1,000,000,000
Debt instrument, unused borrowing capacity, fee, percent											0.75%
Line of Credit Facility, Remaining Borrowing Capacity										$ 500,000,000
Sirius X M 4.625 Senior Notes Due 2023
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate														4.625%
Liberty 1% Cash Convertible Notes Due 2023
Debt Instrument [Line Items]
Debt face amount					$ 450,000,000
Debt Instrument, Interest Rate, Stated Percentage					1.00%
Debt instrument interest rate					1.00%
Conversion amount					$ 1,000
Minimum | $750 million margin loan due 2018
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate											1.75%
Maximum | $750 million margin loan due 2018
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate											2.25%
SIRIUS XM | $750 million margin loan due 2018
Debt Instrument [Line Items]
Margin loan | shares														1,138,400,000
Debt Instrument, Collateral Amount														$ 6,102,000,000
Live Nation | $500 Million Margin Loan due 2018
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity														$ 150,000,000
Margin loan | shares														53,700,000
Debt Instrument, Collateral Amount														$ 2,288,000,000
Liberty Siri MarginCo, LLC | $750 million margin loan due 2018
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis												LIBOR
Liberty Siri MarginCo, LLC | $750 million margin loan due 2018 | Term Loan
Debt Instrument [Line Items]
Debt face amount												$ 250,000,000
Liberty Siri MarginCo, LLC | $750 million margin loan due 2018 | Revolving Credit Facility
Debt Instrument [Line Items]
Debt face amount												$ 750,000,000
Debt instrument, unused borrowing capacity, fee, percent												0.75%
Liberty Siri MarginCo, LLC | Minimum | $750 million margin loan due 2018
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate												1.75%
Liberty Siri MarginCo, LLC | Maximum | $750 million margin loan due 2018
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate												2.50%
LMC LYV, LLC | $500 Million Margin Loan due 2018
Debt Instrument [Line Items]
Debt face amount							$ 500,000,000
Debt Instrument, Description of Variable Rate Basis	LIBOR						LIBOR
Proceeds from Issuance of Secured Debt						$ 350,000,000
Effective interest rate														3.23%
Debt instrument, unused borrowing capacity, fee, percent	0.60%						0.75%
Debt Instrument, Term							2 years
LMC LYV, LLC | $500 Million Margin Loan due 2018 | LIBOR
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate							2.25%
LMC LYV, LLC | Live Nation | $500 Million Margin Loan due 2018
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.90%
SIRIUS XM | Sirius XM Senior Secured Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity														$ 1,450,000,000
SIRIUS XM | Sirius XM 5.25% Senior Secured Notes due 2022
Debt Instrument [Line Items]
Debt face amount																									$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage														5.25%
Repayments of Long-term Debt		$ 411,000,000
Loss on extinguishment of debt		$ 14,000,000
Debt instrument interest rate														5.25%
SIRIUS XM | Sirius XM Senior Secured Revolving Credit Facility
Debt Instrument [Line Items]
Effective interest rate														3.30%
Debt instrument, unused borrowing capacity, fee, percent														0.25%
Line of Credit Facility, Maximum Borrowing Capacity																			$ 1,750,000,000
SIRIUS XM | Sirius X M 4.25 Senior Notes Due 2020
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage														4.25%
Repayments of Long-term Debt				$ 510,000,000
Loss on extinguishment of debt				$ 8,000,000
Debt instrument interest rate														4.25%
SIRIUS XM | Sirius X M 4.25 Senior Notes Due 2020 | Senior Notes
Debt Instrument [Line Items]
Debt face amount													$ 500,000,000
SIRIUS XM | Sirius X M 4.625 Senior Notes Due 2023
Debt Instrument [Line Items]
Debt face amount													500,000,000
SIRIUS XM | Sirius XM Senior Notes Due 2020 And 2023
Debt Instrument [Line Items]
Borrowings of debt													$ 989,000,000
SIRIUS XM | Sirius XM 5.75% Senior Notes Due 2021
Debt Instrument [Line Items]
Debt face amount																								$ 600,000,000
Long-term Debt																								$ 594,000,000
Debt Instrument, Interest Rate, Stated Percentage														5.75%
Repayments of Long-term Debt			$ 618,000,000
Loss on extinguishment of debt			$ 21,000,000
Debt instrument interest rate														5.75%
SIRIUS XM | Sirius XM 6.00% Senior Notes Due 2024
Debt Instrument [Line Items]
Debt face amount																						$ 1,500,000,000
Debt Instrument, Interest Rate, Stated Percentage																						6.00%
Debt instrument interest rate																						6.00%
SIRIUS XM | Sirius XM 5.375% Senior Notes Due 2025
Debt Instrument [Line Items]
Debt face amount																				$ 1,000,000,000
Debt discount																				$ 11,000,000
Debt Instrument, Interest Rate, Stated Percentage														5.375%
Debt instrument interest rate														5.375%
SIRIUS XM | Sirius XM 5.375% Senior Notes due 2026
Debt Instrument [Line Items]
Debt face amount																		$ 1,000,000,000
Debt discount																		$ 11,000,000
Debt Instrument, Interest Rate, Stated Percentage														5.375%
Debt instrument interest rate														5.375%
SIRIUS XM | Sirius XM 3.875% Senior Notes due 2022
Debt Instrument [Line Items]
Debt face amount																	$ 1,000,000,000
Debt Instrument, Interest Rate, Stated Percentage																	3.875%
Debt instrument interest rate																	3.875%
SIRIUS XM | Sirius XM 5.00% Senior Notes due 2027
Debt Instrument [Line Items]
Debt face amount																	$ 1,500,000,000
Debt Instrument, Interest Rate, Stated Percentage																	5.00%
Debt instrument interest rate																	5.00%
Delta Topco
Debt Instrument [Line Items]
Consideration payable					400,000,000
Delta Topco | Liberty 1% Cash Convertible Notes Due 2023
Debt Instrument [Line Items]
Consideration payable					400,000,000
Delta Topco | Live Nation Margin Loan
Debt Instrument [Line Items]
Borrowings of debt					$ 350,000,000
Line of Credit Facility, Maximum Borrowing Capacity							$ 500,000,000
Delta Topco | Delta Topco Limited Exchangeable Redeemable Loan Notes
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					2.00%
Debt instrument interest rate					2.00%
Common Class A | 1.375% Convertible Notes Bond Hedge Transaction
Debt Instrument [Line Items]
Securities Basket price per share | $ / shares														$ 50.24
Common Class A | Warrant transaction
Debt Instrument [Line Items]
Securities Basket price per share | $ / shares														50.24
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares														$ 61.16
Liberty Media Corporation | 2.25% Exchangeable Senior Debentures due 2046
Debt Instrument [Line Items]
Debt face amount								$ 445,000,000
Debt Instrument, Interest Rate, Stated Percentage								2.25%
Debt instrument interest rate								2.25%
Liberty Media Corporation | Time Warner, Inc. | 2.25% Exchangeable Senior Debentures due 2046
Debt Instrument [Line Items]
Shares underlying the debentures | shares								4,250,000
Liberty Media Corporation | Time Warner, Inc. | 2.25% Exchangeable Senior Debentures due 2046 | Senior Notes
Debt Instrument [Line Items]
Exchange Price of Shares Attributable to Debentures | $ / shares								$ 104.55
Liberty Media Corporation | Common Class A | 1.375% Cash Convertible Senior Notes Due 2023
Debt Instrument [Line Items]
Debt instrument, face amount per debenture																					$ 1,000
Debt Instrument, Convertible, Conversion Ratio																21.0859
conversion price for exchangeable debt | $ / shares																					$ 47.43
Liberty Sirius XM Group
Debt Instrument [Line Items]
Long-term Debt														$ 7,496,000,000	6,107,000,000
Debt, Current														755,000,000	5,000,000
Number of tracking stock shares received in the Recapitalization for one share of Liberty Media common stock | shares									1
Borrowings of debt														4,553,000,000	1,847,000,000	$ 1,978,000,000
Repayments of Long-term Debt														3,216,000,000	1,471,000,000	1,038,000,000
Loss on extinguishment of debt														(35,000,000)	(24,000,000)
Liberty Sirius XM Group | Sirius XM Senior Secured Revolving Credit Facility
Debt Instrument [Line Items]
Long-term Debt														300,000,000	390,000,000
Liberty Sirius XM Group | Common Class A
Debt Instrument [Line Items]
Securities basket conversion ratio from shares of Liberty Media Corporation common stock									1.0
Liberty Sirius XM Group | Common Class A | 1.375% Convertible Notes Bond Hedge Transaction
Debt Instrument [Line Items]
Forward contract, number of underlying shares | shares									21,085,900
Liberty Sirius XM Group | Common Class A | Warrant transaction
Debt Instrument [Line Items]
Class of Warrant or Right, Outstanding | shares									21,085,900
Braves Group
Debt Instrument [Line Items]
Long-term Debt														662,000,000	328,000,000
Debt, Current														13,000,000
Number of tracking stock shares received in the Recapitalization for one share of Liberty Media common stock | shares									0.1
Borrowings of debt														544,000,000	460,000,000	197,000,000
Repayments of Long-term Debt														218,000,000	276,000,000	158,000,000
Loss on extinguishment of debt														$ (5,000,000)
Braves Group | Common Class A
Debt Instrument [Line Items]
Securities basket conversion ratio from shares of Liberty Media Corporation common stock									0.10					0.1087
Braves Group | Common Class A | 1.375% Convertible Notes Bond Hedge Transaction
Debt Instrument [Line Items]
Forward contract, number of underlying shares | shares									2,108,590					2,292,037
Braves Group | Common Class A | Warrant transaction
Debt Instrument [Line Items]
Class of Warrant or Right, Outstanding | shares									2,108,590					2,292,037
Formula One Group
Debt Instrument [Line Items]
Long-term Debt														$ 5,796,000,000	1,583,000,000
Number of tracking stock shares received in the Recapitalization for one share of Liberty Media common stock | shares									0.25
Borrowings of debt														1,600,000,000	438,000,000	$ 38,000,000
Repayments of Long-term Debt														1,673,000,000	$ 2,000,000
Loss on extinguishment of debt														$ (8,000,000)
Formula One Group | Common Class A
Debt Instrument [Line Items]
Securities basket conversion ratio from shares of Liberty Media Corporation common stock									0.25
Formula One Group | Common Class A | 1.375% Convertible Notes Bond Hedge Transaction
Debt Instrument [Line Items]
Forward contract, number of underlying shares | shares									5,271,475
Formula One Group | Common Class A | Warrant transaction
Debt Instrument [Line Items]
Class of Warrant or Right, Outstanding | shares									5,271,475
Formula One Group | Common Class C | 1.375% Cash Convertible Senior Notes Due 2023
Debt Instrument [Line Items]
Debt Instrument, Convertible, Conversion Ratio					27.1091
Formula One Group | Common Class C | Liberty 1% Cash Convertible Notes Due 2023
Debt Instrument [Line Items]
conversion price for exchangeable debt | $ / shares					$ 36.89