Quarterly report pursuant to Section 13 or 15(d)

Debt - Schedule of Debt (Details)

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Debt - Schedule of Debt (Details) - USD ($)
Jun. 30, 2021
Feb. 28, 2021
Dec. 31, 2020
Debt Instrument [Line Items]      
Total senior notes $ 14,973,000,000   $ 15,006,000,000
Mortgage notes payable 0   50,000,000
Construction loan payable 187,000,000   180,000,000
Finance leases and other 180,000,000   153,000,000
Debt issuance costs (155,000,000)   (157,000,000)
Total debt 16,789,000,000   16,779,000,000
Less current portion (253,000,000)   (97,000,000)
 Long-term debt 16,536,000,000   16,682,000,000
Revolving credit agreement      
Debt Instrument [Line Items]      
Credit facility 154,000,000   97,000,000
Term loan facility      
Debt Instrument [Line Items]      
Credit facility 1,450,000,000   1,450,000,000
$2,200 million 4.75% Senior Notes due January 15, 2025 | Senior Notes      
Debt Instrument [Line Items]      
Debt, face amount $ 2,200,000,000 $ 2,200,000,000  
Interest rate 4.75% 4.75%  
Senior notes $ 0   2,230,000,000
$1,800 million 5.375% Senior Notes due June 1, 2026 | Senior Notes      
Debt Instrument [Line Items]      
Debt, face amount $ 1,800,000,000    
Interest rate 5.375%    
Senior notes $ 1,800,000,000   1,800,000,000
$750 million 5.375% Senior Notes due August 15, 2026 | Senior Notes      
Debt Instrument [Line Items]      
Debt, face amount $ 750,000,000    
Interest rate 5.375%    
Senior notes $ 790,000,000   794,000,000
$2,500 million 4.25% Senior Notes due December 15, 2027 | Senior Notes      
Debt Instrument [Line Items]      
Debt, face amount $ 2,500,000,000    
Interest rate 4.25%    
Senior notes $ 2,483,000,000   2,482,000,000
$3,500 million 4.625% Senior Notes due December 15, 2029 | Senior Notes      
Debt Instrument [Line Items]      
Debt, face amount $ 3,500,000,000    
Interest rate 4.625%    
Senior notes $ 3,500,000,000   3,500,000,000
$2,000 million 3.375% Senior Notes due February 15, 2030 | Senior Notes      
Debt Instrument [Line Items]      
Debt, face amount $ 2,000,000,000    
Interest rate 3.375%    
Senior notes $ 2,000,000,000   2,000,000,000
$2,200 million 3.00% Senior Notes due October 15, 2030 | Senior Notes      
Debt Instrument [Line Items]      
Debt, face amount $ 2,200,000,000    
Interest rate 3.00%    
Senior notes $ 2,200,000,000   2,200,000,000
$2,200 million 2.50% Senior Notes due March 1, 2031 | Senior Notes      
Debt Instrument [Line Items]      
Debt, face amount $ 2,200,000,000 $ 2,200,000,000  
Interest rate 2.50% 2.50%  
Senior notes $ 2,200,000,000   $ 0