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Debt and Credit Facilities (Details) - USD ($)
1 Months Ended 3 Months Ended 13 Months Ended
Feb. 28, 2022
Mar. 31, 2023
Mar. 31, 2023
Dec. 31, 2022
Line of Credit Facility [Line Items]        
Commercial paper   $ 0 $ 0  
Borrowings outstanding under credit facility   0 0  
Other Long-term Debt   8,000,000 8,000,000 $ 7,000,000
Total debt   13,061,000,000 13,061,000,000 13,048,000,000
Less current maturities   1,204,000,000 1,204,000,000 1,191,000,000
Total long-term debt   11,857,000,000 11,857,000,000 11,857,000,000
Unamortized debt issuance costs   51,000,000 51,000,000 52,000,000
Borrowing capacity on existing facilities   2,160,000,000 2,160,000,000 2,162,000,000
Fair value of senior unsecured notes   $ 11,274,000,000 11,274,000,000 10,910,000,000
Term Loan        
Line of Credit Facility [Line Items]        
Debt instrument, face amount $ 1,500,000,000      
Repayments of debt     750,000,000  
Maturity Date      
Long-term Debt   $ 750,000,000 750,000,000 850,000,000
Term Loan | SOFR        
Line of Credit Facility [Line Items]        
Basis spread on variable rate (as a percent) 0.725%      
Credit Agreement | Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Line of credit facility, maximum borrowing capacity   $ 2,250,000,000 $ 2,250,000,000 1,500,000,000
Senior Unsecured Notes 1.125% due 2021        
Line of Credit Facility [Line Items]        
Stated interest rate   1.125% 1.125%  
Maturity Date   Nov. 30, 2023    
Unsecured Debt   $ 599,000,000 $ 599,000,000 585,000,000
Senior Unsecured Notes, 0.600% Due 2023        
Line of Credit Facility [Line Items]        
Stated interest rate   0.60% 0.60%  
Maturity Date   Dec. 01, 2023    
Unsecured Debt   $ 599,000,000 $ 599,000,000 599,000,000
Senior Unsecured Notes 3.375% due 2024        
Line of Credit Facility [Line Items]        
Stated interest rate   3.375% 3.375%  
Maturity Date   May 15, 2024    
Unsecured Debt   $ 597,000,000 $ 597,000,000 596,000,000
Senior Unsecured Notes, 0.250% Due 2024        
Line of Credit Facility [Line Items]        
Stated interest rate   0.25% 0.25%  
Maturity Date   Dec. 03, 2024    
Unsecured Debt   $ 925,000,000 $ 925,000,000 903,000,000
Senior Unsecured Notes, 1.150% Due 2025        
Line of Credit Facility [Line Items]        
Stated interest rate   1.15% 1.15%  
Maturity Date   Jun. 15, 2025    
Unsecured Debt   $ 647,000,000 $ 647,000,000 647,000,000
Senior Unsecured Notes 3.375% due 2025        
Line of Credit Facility [Line Items]        
Stated interest rate   3.375% 3.375%  
Maturity Date   Nov. 01, 2025    
Unsecured Debt   $ 748,000,000 $ 748,000,000 748,000,000
Senior Unsecured Notes 3.50% due 2026        
Line of Credit Facility [Line Items]        
Stated interest rate   3.50% 3.50%  
Maturity Date   Mar. 15, 2026    
Unsecured Debt   $ 996,000,000 $ 996,000,000 995,000,000
Senior Unsecured Notes 2.125% due 2027        
Line of Credit Facility [Line Items]        
Stated interest rate   2.125% 2.125%  
Maturity Date   Nov. 30, 2027    
Unsecured Debt   $ 814,000,000 $ 814,000,000 795,000,000
Senior Unsecured Notes 3.650% due 2028        
Line of Credit Facility [Line Items]        
Stated interest rate   3.65% 3.65%  
Maturity Date   Mar. 07, 2028    
Unsecured Debt   $ 597,000,000 $ 597,000,000 597,000,000
Senior Unsecured Notes, 0.750% Due 2029        
Line of Credit Facility [Line Items]        
Stated interest rate   0.75% 0.75%  
Maturity Date   Mar. 01, 2029    
Unsecured Debt   $ 868,000,000 $ 868,000,000 848,000,000
Senior Unsecured Notes, 1.950% Due 2030        
Line of Credit Facility [Line Items]        
Stated interest rate   1.95% 1.95%  
Maturity Date   Jun. 15, 2030    
Unsecured Debt   $ 991,000,000 $ 991,000,000 991,000,000
Senior Unsecured Notes 2.625% due 2030        
Line of Credit Facility [Line Items]        
Stated interest rate   2.625% 2.625%  
Maturity Date   Nov. 30, 2030    
Unsecured Debt   $ 701,000,000 $ 701,000,000 684,000,000
Senior Unsecured Notes, 1.000% Due 2031        
Line of Credit Facility [Line Items]        
Stated interest rate   1.00% 1.00%  
Maturity Date   Dec. 03, 2031    
Unsecured Debt   $ 809,000,000 $ 809,000,000 790,000,000
Senior Unsecured Notes 4.100% due 2043        
Line of Credit Facility [Line Items]        
Stated interest rate   4.10% 4.10%  
Maturity Date   Apr. 01, 2043    
Unsecured Debt   $ 392,000,000 $ 392,000,000 392,000,000
Senior Unsecured Notes 4.375% due 2044        
Line of Credit Facility [Line Items]        
Stated interest rate   4.375% 4.375%  
Maturity Date   May 15, 2044    
Unsecured Debt   $ 395,000,000 $ 395,000,000 396,000,000
Senior Unsecured Notes 4.625% due 2046        
Line of Credit Facility [Line Items]        
Stated interest rate   4.625% 4.625%  
Maturity Date   Mar. 15, 2046    
Unsecured Debt   $ 983,000,000 $ 983,000,000 983,000,000
Senior Unsecured Notes, 2.900% due 2050        
Line of Credit Facility [Line Items]        
Stated interest rate   2.90% 2.90%  
Maturity Date   Jun. 15, 2050    
Unsecured Debt   $ 642,000,000 $ 642,000,000 $ 642,000,000
Commercial Paper        
Line of Credit Facility [Line Items]        
Debt instrument, maturity   397 days