Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Debt) (Details)

v3.20.2
Long-Term Debt (Debt) (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Feb. 04, 2020
Dec. 31, 2019
Jul. 01, 2019
Jun. 15, 2016
Debt Instrument [Line Items]            
Derivative, Notional Amount         $ 125 $ 125
Debt Issuance Costs $ (45) $ (40)        
Total debt and finance lease obligations 4,575     $ 5,119    
Less current portion (18)     (18)    
Long-term portion of debt and finance lease obligations 4,557     5,101    
5.125% Senior Secured Notes due 2022            
Debt Instrument [Line Items]            
Debt and Lease Obligation $ 500     500    
Debt Instrument, Interest Rate, Stated Percentage 5.125%          
4.375% Senior Secured Notes due 2023, net of original issue discount            
Debt Instrument [Line Items]            
Debt and Lease Obligation $ 750     750    
Debt Instrument, Interest Rate, Stated Percentage 4.375%          
4.85% Senior Secured Notes due 2024, net of original issue discount            
Debt Instrument [Line Items]            
Debt and Lease Obligation $ 600     600    
Debt Instrument, Interest Rate, Stated Percentage 4.85%          
4.45% Senior Secured Notes due 2025, net of original issue discount            
Debt Instrument [Line Items]            
Debt and Lease Obligation $ 599     599    
Debt Instrument, Interest Rate, Stated Percentage 4.45%          
5.45% Senior Secured Notes due 2034, net of original issue discount            
Debt Instrument [Line Items]            
Debt and Lease Obligation $ 399     399    
Debt Instrument, Interest Rate, Stated Percentage 5.45%          
5.95% Senior Secured Notes due 2043, net of original issue discount            
Debt Instrument [Line Items]            
Debt and Lease Obligation $ 300     300    
Debt Instrument, Interest Rate, Stated Percentage 5.95%          
6.375% Senior Secured Notes [Member]            
Debt Instrument [Line Items]            
Debt and Lease Obligation $ 225     225    
Debt Instrument, Interest Rate, Stated Percentage 637.50%          
Senior secured credit facility            
Debt Instrument [Line Items]            
Debt and Lease Obligation $ 0     1,105    
Finance lease obligations            
Debt Instrument [Line Items]            
Debt and Lease Obligation 172     181    
6.25% Senior Secured Notes [Member]            
Debt Instrument [Line Items]            
Debt and Lease Obligation $ 500     500    
Debt Instrument, Interest Rate, Stated Percentage 625.00%          
4.75% Senior Secured Notes            
Debt Instrument [Line Items]            
Debt and Lease Obligation $ 575   $ 575 $ 0    
Debt Instrument, Interest Rate, Stated Percentage     475.00%