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Debt - Schedule of Current Portion of Debt (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Current portion of debt	$ 2,009	$ 4,049
$3.5 billion credit facility due August 20, 2027
Debt Instrument [Line Items]
Current portion of debt	0	0
Maximum borrowing capacity	3,500
Commercial paper notes
Debt Instrument [Line Items]
Current portion of debt	331	$ 1,989
Maximum borrowing capacity	3,500
4.15%, due February 2024 | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage		4.15%
Current portion of debt	0	$ 650
4.30%, due May 2024 | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage		4.30%
Current portion of debt	0	$ 600
4.25%, due September 2024 | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage		4.25%
Current portion of debt	$ 0	$ 650
4.30%, due June 2025 | Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage	4.30%
Current portion of debt	$ 1,500	0
Trust I Preferred Securities, 4.75%, due March 2028(d) | Capital Trust I
Debt Instrument [Line Items]
Interest rate, stated percentage	4.75%
Current portion of debt	$ 111	111
Current portion of other debt
Debt Instrument [Line Items]
Current portion of debt	$ 67	$ 49

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