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Summary of Significant Accounting Policies - Depreciation and Amortization (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Capitalized Contract Cost [Line Items]
Amortization of capitalized contract costs related to fulfillment/customer acquisitions			$ 226	$ 140
Amortization of customer relationships and other intangible assets	$ 155	$ 217	308	418
Depreciation of property, plant and equipment	71	68	136	135
Total depreciation and amortization	344	360	670	693
Contract Cost Fulfillment
Capitalized Contract Cost [Line Items]
Amortization of capitalized contract costs related to fulfillment/customer acquisitions	48	27	89	48
Contract Cost, Acquisitions
Capitalized Contract Cost [Line Items]
Amortization of capitalized contract costs related to fulfillment/customer acquisitions	$ 70	$ 48	$ 137	$ 92

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets.

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