Summary of Significant Accounting Policies - Presentation Adjustments Related to Capitalized Contract Costs (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reclassification [Line Items]
Cost of operations (excluding depreciation and amortization shown below)	$ 22,100	$ 26,483	$ 27,443
Depreciation and amortization	1,403	1,295	720
Selling, general and administrative costs	2,031	1,843	1,145
Amortization of capitalized contract costs	332	168	86
Prepayments and other current assets	$ (539)	(401)	(69)
As Previously Presented
Reclassification [Line Items]
Cost of operations (excluding depreciation and amortization shown below)		26,526	27,446
Depreciation and amortization		1,127	634
Selling, general and administrative costs		1,968	1,228
Amortization of capitalized contract costs		0	0
Prepayments and other current assets		(233)	17
Presentation Adjustments \| Reclassification, Other
Reclassification [Line Items]
Cost of operations (excluding depreciation and amortization shown below)		(43)	(3)
Depreciation and amortization		168	86
Selling, general and administrative costs		(125)	(83)
Amortization of capitalized contract costs		168	86
Prepayments and other current assets		$ (168)	$ (86)

Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer.

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