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Debt and Credit Facilities (Details) - USD ($)
3 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Line of Credit Facility [Line Items]    
Commercial paper $ 0  
Total debt 12,865,000,000 $ 12,995,000,000
Less current maturities 2,058,000,000 2,094,000,000
Total long-term debt 10,807,000,000 10,901,000,000
Unamortized debt issuance costs 34,000,000 50,000,000
Borrowing capacity on existing facilities 2,159,000,000 2,160,000,000
Fair value of senior unsecured notes 12,008,000,000 12,252,000,000
Commercial Paper    
Line of Credit Facility [Line Items]    
Debt instrument, face amount 2,250,000,000  
Revolving Credit Facility    
Line of Credit Facility [Line Items]    
Borrowings outstanding under credit facility $ 0  
Senior Unsecured Notes 3.375% Due May 15, 2024    
Line of Credit Facility [Line Items]    
Stated interest rate 3.375%  
Unsecured debt $ 600,000,000 600,000,000
Senior Unsecured Notes, Floating, due November 16, 2024    
Line of Credit Facility [Line Items]    
Unsecured debt $ 540,000,000 554,000,000
Senior Unsecured Notes, 0.250% Due 2024 [Member]    
Line of Credit Facility [Line Items]    
Stated interest rate 0.25%  
Unsecured debt $ 918,000,000 940,000,000
Senior Unsecured Notes, 1.150% Due 2025    
Line of Credit Facility [Line Items]    
Stated interest rate 1.15%  
Unsecured debt $ 649,000,000 648,000,000
Senior Unsecured Notes 3.375% Due 2025    
Line of Credit Facility [Line Items]    
Stated interest rate 3.375%  
Unsecured debt $ 749,000,000 749,000,000
Senior Unsecured Notes 3.500% Due 2026    
Line of Credit Facility [Line Items]    
Stated interest rate 3.50%  
Unsecured debt $ 997,000,000 997,000,000
Senior Unsecured Notes, 2.125% Due 2027 [Member]    
Line of Credit Facility [Line Items]    
Stated interest rate 2.125%  
Unsecured debt $ 808,000,000 828,000,000
Senior Unsecured Notes 3.650% Due 2028    
Line of Credit Facility [Line Items]    
Stated interest rate 3.65%  
Unsecured debt $ 598,000,000 598,000,000
Senior Unsecured Notes 4.850% Due 2028    
Line of Credit Facility [Line Items]    
Stated interest rate 4.85%  
Unsecured debt $ 596,000,000 596,000,000
Senior Unsecured Notes, 3.375% Due 2028 [Member]    
Line of Credit Facility [Line Items]    
Stated interest rate 3.375%  
Unsecured debt $ 645,000,000 661,000,000
Senior Unsecured Notes 0.750% due 2029    
Line of Credit Facility [Line Items]    
Stated interest rate 0.75%  
Unsecured debt $ 861,000,000 883,000,000
Senior Unsecured Notes, 1.950% Due 2030    
Line of Credit Facility [Line Items]    
Stated interest rate 1.95%  
Unsecured debt $ 991,000,000 991,000,000
Senior Unsecured Notes, 2.625% due November 2030    
Line of Credit Facility [Line Items]    
Stated interest rate 2.625%  
Unsecured debt $ 696,000,000 713,000,000
Senior Unsecured Notes 1.000% due 2031    
Line of Credit Facility [Line Items]    
Stated interest rate 1.00%  
Unsecured debt $ 803,000,000 823,000,000
Senior Unsecured Notes 4.100% due 2043    
Line of Credit Facility [Line Items]    
Stated interest rate 4.10%  
Unsecured debt $ 393,000,000 393,000,000
Senior Unsecured Notes 4.375% due 2044    
Line of Credit Facility [Line Items]    
Stated interest rate 4.375%  
Unsecured debt $ 396,000,000 396,000,000
Senior Unsecured Notes 4.625% due 2046    
Line of Credit Facility [Line Items]    
Stated interest rate 4.625%  
Unsecured debt $ 983,000,000 983,000,000
Senior Unsecured Notes, 2.900% due 2050    
Line of Credit Facility [Line Items]    
Stated interest rate 2.90%  
Unsecured debt $ 642,000,000 $ 642,000,000
Commercial Paper    
Line of Credit Facility [Line Items]    
Debt instrument, maturity 397 days