Debt and Borrowing Arrangements - Long-Term Debt (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025		Dec. 31, 2024
Debt Instrument [Line Items]
Finance leases and other	$ 423	[1]	$ 310
Total	18,517	[1]	17,678
less: current portion of long-term debt	(1,295)	[1]	(2,014)
Long-term debt	17,222	[1]	15,664
Unamortized premiums, discounts and bank fees	(119)
Imputed interest on finance leases	(42)
U.S. dollar notes, 1.250% to 7.000% (weighted-average effective rate 3.660%), due through 2050
Debt Instrument [Line Items]
Notes payable	$ 9,180	[1]	8,834
U.S. dollar notes, 1.250% to 7.000% (weighted-average effective rate 3.660%), due through 2050 | Minimum
Debt Instrument [Line Items]
Effective interest rate	1.25%
U.S. dollar notes, 1.250% to 7.000% (weighted-average effective rate 3.660%), due through 2050 | Maximum
Debt Instrument [Line Items]
Effective interest rate	7.00%
U.S. dollar notes, 1.250% to 7.000% (weighted-average effective rate 3.660%), due through 2050 | Weighted Average
Debt Instrument [Line Items]
Effective interest rate	3.66%
Euro notes, 0.000% to 2.375% (weighted-average effective rate 0.975%), due through 2041
Debt Instrument [Line Items]
Notes payable	$ 8,092	[1]	7,122
Euro notes, 0.000% to 2.375% (weighted-average effective rate 0.975%), due through 2041 | Minimum
Debt Instrument [Line Items]
Effective interest rate	0.00%
Euro notes, 0.000% to 2.375% (weighted-average effective rate 0.975%), due through 2041 | Maximum
Debt Instrument [Line Items]
Effective interest rate	2.375%
Euro notes, 0.000% to 2.375% (weighted-average effective rate 0.975%), due through 2041 | Weighted Average
Debt Instrument [Line Items]
Effective interest rate	0.975%
Pound sterling notes, 3.875% to 4.500% (weighted-average effective rate 4.151%), due through 2045
Debt Instrument [Line Items]
Notes payable	$ 353	[1]	327
Pound sterling notes, 3.875% to 4.500% (weighted-average effective rate 4.151%), due through 2045 | Minimum
Debt Instrument [Line Items]
Effective interest rate	3.875%
Pound sterling notes, 3.875% to 4.500% (weighted-average effective rate 4.151%), due through 2045 | Maximum
Debt Instrument [Line Items]
Effective interest rate	4.50%
Pound sterling notes, 3.875% to 4.500% (weighted-average effective rate 4.151%), due through 2045 | Weighted Average
Debt Instrument [Line Items]
Effective interest rate	4.151%
Swiss franc notes
Debt Instrument [Line Items]
Notes payable	$ 0	[1]	221
Canadian dollar notes, 4.625% (effective rate 4.719%), due through 2031
Debt Instrument [Line Items]
Notes payable	$ 469	[1]	$ 864
Canadian dollar notes, 4.625% (effective rate 4.719%), due through 2031 | Maximum
Debt Instrument [Line Items]
Effective interest rate	4.625%
Canadian dollar notes, 4.625% (effective rate 4.719%), due through 2031 | Weighted Average
Debt Instrument [Line Items]
Effective interest rate	4.719%

[1] Amounts are shown net of unamortized discounts, premiums and bank fees of $(119) million and imputed interest on finance leases of $(42) million.