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
9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Aug. 20, 2020
Feb. 04, 2020
Jul. 01, 2019
Jun. 15, 2016
Debt Instrument [Line Items]            
Derivative, Notional Amount         $ 125 $ 125
Debt Issuance Costs $ (51) $ (40)        
Total debt and finance lease obligations 4,567 5,119        
Less current portion (18) (18)        
Long-term portion of debt and finance lease obligations 4,549 5,101        
5.125% Senior Secured Notes due 2022            
Debt Instrument [Line Items]            
Debt and Lease Obligation $ 0 500        
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%          
4.75% Senior Secured Notes            
Debt Instrument [Line Items]            
Debt and Lease Obligation $ 575 0   $ 575    
Debt Instrument, Interest Rate, Stated Percentage 4.75%     4.75%    
4.375% Senior Secured Notes due 2028            
Debt Instrument [Line Items]            
Debt and Lease Obligation $ 500 0        
Debt Instrument, Interest Rate, Stated Percentage 4.375%   4.375% 4.75%    
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 6.375%          
6.25% Senior Secured Notes [Member]            
Debt Instrument [Line Items]            
Debt and Lease Obligation $ 500 500 $ 500      
Debt Instrument, Interest Rate, Stated Percentage 6.25%          
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 $ 170 $ 181