Debt and Credit Facilities (Details) - USD ($)	1 Months Ended	3 Months Ended
Feb. 28, 2022	Mar. 31, 2022	Dec. 31, 2021
Commercial paper		$ 195,000,000	$ 0
Other Long-term Debt		23,000,000	10,000,000
Total debt		14,099,000,000	12,479,000,000
Less current maturities of debt		214,000,000	7,000,000
Total long-term debt		13,885,000,000	12,472,000,000
Unamortized debt issuance costs		59,000,000	62,000,000
Borrowing capacity on existing facilities		2,162,000,000	2,162,000,000
Fair value of senior unsecured notes		$ 12,369,000,000	13,391,000,000
Term Loan
Debt instrument, face amount	$ 1,500,000,000
Basis spread on variable rate (as a percent)	0.725%
Maturity Date		Feb. 22, 2025
Long-term Debt		$ 1,500,000,000	0
Credit Agreement \| Revolving Credit Facility
Line of credit facility, maximum borrowing capacity		$ 2,250,000,000	1,500,000,000
Senior Unsecured Notes 1.125% due 2021
Stated interest rate		1.125%
Maturity Date		Nov. 30, 2023
Unsecured Debt		$ 610,000,000	622,000,000
Senior Unsecured Notes, 0.600% Due 2023
Stated interest rate		0.60%
Maturity Date		Dec. 01, 2023
Unsecured Debt		$ 594,000,000	598,000,000
Senior Unsecured Notes 3.375% due 2024
Stated interest rate		3.375%
Maturity Date		May 15, 2024
Unsecured Debt		$ 598,000,000	593,000,000
Senior Unsecured Notes, 0.250% Due 2024
Stated interest rate		0.25%
Maturity Date		Dec. 03, 2024
Unsecured Debt		$ 941,000,000	958,000,000
Senior Unsecured Notes, 1.150% Due 2025
Stated interest rate		1.15%
Maturity Date		Jun. 15, 2025
Unsecured Debt		$ 646,000,000	645,000,000
Senior Unsecured Notes 3.375% due 2025
Stated interest rate		3.375%
Maturity Date		Nov. 01, 2025
Unsecured Debt		$ 748,000,000	748,000,000
Senior Unsecured Notes 3.50% due 2026
Stated interest rate		3.50%
Maturity Date		Mar. 15, 2026
Unsecured Debt		$ 994,000,000	994,000,000
Senior Unsecured Notes 2.125% due 2027
Stated interest rate		2.125%
Maturity Date		Nov. 30, 2027
Unsecured Debt		$ 829,000,000	845,000,000
Senior Unsecured Notes 3.650% due 2028
Stated interest rate		3.65%
Maturity Date		Mar. 07, 2028
Unsecured Debt		$ 597,000,000	597,000,000
Senior Unsecured Notes, 0.750% Due 2029
Stated interest rate		0.75%
Maturity Date		Mar. 01, 2029
Unsecured Debt		$ 885,000,000	901,000,000
Senior Unsecured Notes, 1.950% Due 2030
Stated interest rate		1.95%
Maturity Date		Jun. 15, 2030
Unsecured Debt		$ 990,000,000	990,000,000
Senior Unsecured Notes 2.625% due 2030
Stated interest rate		2.625%
Maturity Date		Nov. 30, 2030
Unsecured Debt		$ 714,000,000	727,000,000
Senior Unsecured Notes, 1.000% Due 2031
Stated interest rate		1.00%
Maturity Date		Dec. 03, 2031
Unsecured Debt		$ 824,000,000	840,000,000
Senior Unsecured Notes 4.100% due 2043
Stated interest rate		4.10%
Maturity Date		Apr. 01, 2043
Unsecured Debt		$ 392,000,000	392,000,000
Senior Unsecured Notes 4.375% due 2044
Stated interest rate		4.375%
Maturity Date		May 15, 2044
Unsecured Debt		$ 395,000,000	395,000,000
Senior Unsecured Notes 4.625% due 2046
Stated interest rate		4.625%
Maturity Date		Mar. 15, 2046
Unsecured Debt		$ 982,000,000	982,000,000
Senior Unsecured Notes, 2.900% due 2050
Stated interest rate		2.90%
Maturity Date		Jun. 15, 2050
Unsecured Debt		$ 642,000,000	$ 642,000,000
Commercial Paper
Debt instrument, maturity		397 days

Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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