Quarterly report pursuant to Section 13 or 15(d)

Assets And Liabilities Measured At Fair Value (Details)

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Assets And Liabilities Measured At Fair Value (Details) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Sep. 30, 2014
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Oct. 17, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Realized and unrealized gains (losses) on financial instruments, net       $ (32,000,000) $ 40,000,000 $ (40,000,000) $ 12,000,000  
Payments for (Proceeds from) Derivative Instrument, Investing Activities             19,000,000  
1.375% Cash Convertible Senior Notes due 2023                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Debt face amount               $ 1,000,000,000
1.375% Cash Convertible Senior Notes due 2023 | Level 2                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Debt face amount               $ 1,000,000,000
Fair Value Option Securities                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Realized and unrealized gains (losses) on financial instruments, net       5,000,000 9,000,000 29,000,000 (22,000,000)  
Convertible Notes Payable                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Realized and unrealized gains (losses) on financial instruments, net       4,000,000 49,000,000 1,000,000 49,000,000  
1.375% Convertible Notes Bond Hedge Transaction                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Realized and unrealized gains (losses) on financial instruments, net       (40,000,000) (46,000,000) (68,000,000) (38,000,000)  
Other Financial Instruments                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Realized and unrealized gains (losses) on financial instruments, net       $ (1,000,000) $ 28,000,000 $ (2,000,000) $ 23,000,000  
Forward Contracts | Live Nation                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Maximum shares to be purchased     15,900,000          
Weighted average stock price shares purchased by counterparty   24.93            
Payments for (Proceeds from) Derivative Instrument, Investing Activities $ 396,000,000