Liberty Media Corporation Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document And Entity Information
Financial Statements
Notes to Financial Statements
Notes Tables
Notes Details

Investments In Available-For-Sale Securities And Other Cost Investments - Text (Details)

v3.5.0.2

Investments In Available-For-Sale Securities And Other Cost Investments - Text (Details) - USD ($) shares in Millions, $ in Millions		3 Months Ended	9 Months Ended
	Sep. 07, 2016	Mar. 31, 2017	Sep. 30, 2016	Oct. 27, 2016	Dec. 31, 2015
Schedule of Investments [Line Items]
Investments in and loans to cost and equity investees			$ (762)
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax			0		$ 0
Formula 1
Schedule of Investments [Line Items]
Investment ownership percentage	20.00%
Investments in and loans to cost and equity investees	$ (746)
Payments to Acquire Investments, gross	821
Investment Discount	75
Diluted investment ownership percentage				19.10%
Acquisition transaction price	8,000
Enterprise Value	8,000
Equity Value of Acquired Business	$ 4,400
Formula 1 \| Forecast
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Payments to Acquire Businesses, Gross		$ 1,100
Liberty Media Group
Schedule of Investments [Line Items]
Investments in and loans to cost and equity investees			$ (749)
Liberty Media Group \| Forecast \| Common Class C
Schedule of Investments [Line Items]
Stock Issued During Period, Shares, Period Increase (Decrease)		138
Liberty Media Group \| Formula 1
Schedule of Investments [Line Items]
Investment ownership percentage	20.00%
Diluted investment ownership percentage				19.10%
Liberty Media Group \| Formula 1 \| Forecast
Schedule of Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Seller Ownership Percentage in Liberty Media		65.00%
Delta Topco \| Forecast \| Exchangeable Debt
Schedule of Investments [Line Items]
Debt Instrument, Face Amount		$ 351

- Definition

The transaction price for an acquisition of a business

+ References

No definition available.

+ Details

Name:	lmca_AcquisitionTransactionPrice
Namespace Prefix:	lmca_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Investment purchase discount.

+ References

No definition available.

+ Details

Name:	lmca_BusinessAcquisitionDiscount
Namespace Prefix:	lmca_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The company's ownership percentage of a cost investment on a diluted basis

+ References

No definition available.

+ Details

Name:	lmca_DilutedInvestmentOwnershipPercentage
Namespace Prefix:	lmca_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Enterprise value of acquired business

+ References

No definition available.

+ Details

Name:	lmca_EnterpriseValue
Namespace Prefix:	lmca_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Equity Value of Acquired Business

+ References

No definition available.

+ Details

Name:	lmca_EquityValueOfAcquiredBusiness
Namespace Prefix:	lmca_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The company's ownership percentage in a cost investment

+ References

No definition available.

+ Details

Name:	lmca_InvestmentOwnershipPercentage
Namespace Prefix:	lmca_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Payments to Acquire Investments, gross

+ References

No definition available.

+ Details

Name:	lmca_PaymentsToAcquireInvestmentsGross
Namespace Prefix:	lmca_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Seller ownership percentage in Liberty Media after transaction due to shares issued as consideration.

+ References

No definition available.

+ Details

Name:	lmca_SellerOwnershipPercentageInLibertyMedia
Namespace Prefix:	lmca_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Accumulated appreciation or loss, net of tax, in value of the total of available-for-sale securities at the end of an accounting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e681-108580

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580

+ Details

Name:	us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463

+ Details

Name:	us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow associated with the purchase of all investments (debt, security, other) during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The increase (decrease) during the period in the number of shares issued.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=lmca_FormulaOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	lmca_EconomicPerformanceGroupAxis=lmca_LibertyMediaGroupMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=lmca_DeltaTopcoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_ExchangeableDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: