Derivative Financial Instruments and Hedging Activities - Income (Losses) Recognized in Income (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Interest expense	$ 6,030	$ 4,685	$ 2,881
Operating expenses	1,802	1,818	1,662
Interest Expense
Derivatives, Fair Value [Line Items]
Total income (loss) recognized	(280)	79	33
Interest Expense \| Derivatives Designated as Hedges \| Fair value hedges \| Interest rate swaps
Derivatives, Fair Value [Line Items]
Hedged items	252	248	1,003
Interest rate swaps and Foreign currency swaps	(452)	(279)	(957)
Interest Expense \| Derivatives Designated as Hedges \| Fair value hedges \| Foreign currency swaps
Derivatives, Fair Value [Line Items]
Hedged items	0	0	0
Interest rate swaps and Foreign currency swaps	0	0	(2)
Interest Expense \| Derivatives Designated as Hedges \| Cash flow hedges \| Interest rate swaps
Derivatives, Fair Value [Line Items]
Interest rate swaps and Foreign currency swaps	15	37	15
Interest Expense \| Derivatives Designated as Hedges \| Cash flow hedges \| Foreign currency swaps
Derivatives, Fair Value [Line Items]
Hedged items	0	0	0
Interest rate swaps and Foreign currency swaps	(145)	(145)	(156)
Interest Expense \| Derivatives not Designated as Hedges
Derivatives, Fair Value [Line Items]
Interest rate contracts	51	218	130
Foreign currency contracts	0	0	0
Operating Expenses
Derivatives, Fair Value [Line Items]
Total income (loss) recognized	2	(1)	(4)
Operating Expenses \| Derivatives Designated as Hedges \| Fair value hedges \| Interest rate swaps
Derivatives, Fair Value [Line Items]
Hedged items	0	0	0
Interest rate swaps and Foreign currency swaps	0	0	0
Operating Expenses \| Derivatives Designated as Hedges \| Fair value hedges \| Foreign currency swaps
Derivatives, Fair Value [Line Items]
Hedged items	0	0	23
Interest rate swaps and Foreign currency swaps	0	0	(24)
Operating Expenses \| Derivatives Designated as Hedges \| Cash flow hedges \| Interest rate swaps
Derivatives, Fair Value [Line Items]
Interest rate swaps and Foreign currency swaps	0	0	0
Operating Expenses \| Derivatives Designated as Hedges \| Cash flow hedges \| Foreign currency swaps
Derivatives, Fair Value [Line Items]
Hedged items	414	(263)	611
Interest rate swaps and Foreign currency swaps	(413)	263	(611)
Operating Expenses \| Derivatives not Designated as Hedges
Derivatives, Fair Value [Line Items]
Interest rate contracts	0	0	0
Foreign currency contracts	0	(1)	(4)
Accumulated Other Comprehensive Income (Loss)
Derivatives, Fair Value [Line Items]
Gains (Losses) Recognized In Accumulated Other Comprehensive Income (Loss)	(332)	138	(514)
(Gains) Losses Reclassified From Accumulated Other Comprehensive Income (Loss) Into Income (Loss)	413	(120)	569
Foreign currency translation adjustment \| Fair value hedges \| Foreign currency swaps
Derivatives, Fair Value [Line Items]
Gains (Losses) Recognized In Accumulated Other Comprehensive Income (Loss)	0	0	(2)
(Gains) Losses Reclassified From Accumulated Other Comprehensive Income (Loss) Into Income (Loss)	0	0	2
Foreign currency translation adjustment \| Cash flow hedges \| Foreign currency swaps
Derivatives, Fair Value [Line Items]
Gains (Losses) Recognized In Accumulated Other Comprehensive Income (Loss)	(375)	139	(529)
(Gains) Losses Reclassified From Accumulated Other Comprehensive Income (Loss) Into Income (Loss)	422	(92)	578
Unrealized gain (loss) on hedges \| Cash flow hedges \| Interest rate swaps
Derivatives, Fair Value [Line Items]
Gains (Losses) Recognized In Accumulated Other Comprehensive Income (Loss)	43	(1)	17
(Gains) Losses Reclassified From Accumulated Other Comprehensive Income (Loss) Into Income (Loss)	$ (9)	$ (28)	$ (11)

Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.

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Amount of interest expense classified as nonoperating.

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