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Condensed Consolidated Financial Statement Details - Intangible Assets, Software and Impairments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 499	$ 545	$ 996	$ 1,102
Asset impairments	6,841	29	6,841	87
Non-Strategic Business
Finite-Lived Intangible Assets [Line Items]
Asset impairments		29		29
Real-Estate Related Assets
Finite-Lived Intangible Assets [Line Items]
Asset impairments				58
Property and Equipment
Finite-Lived Intangible Assets [Line Items]
Depreciation expense	56	64	114	137
Software
Finite-Lived Intangible Assets [Line Items]
Amortization expense	246	274	497	561
Platform Initiatives
Finite-Lived Intangible Assets [Line Items]
Software amortization expense	11	$ 47	27	$ 109
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	7,894		7,894
Trademarks and Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	$ 190		$ 190