Goodwill, Customer Relationships and Other Intangible Assets - Additional Information (Details) $ in Millions		3 Months Ended		6 Months Ended
	Oct. 31, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) reporting_unit	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Finite-Lived Intangible Assets [Line Items]
Goodwill		$ 0		$ 0		$ 1,970
Accumulated impairment losses		10,200		$ 10,200		$ 8,200
Number of reporting units | reporting_unit				1
Goodwill impairment	$ 2,000	1,970	$ 0	$ 1,970	$ 0
Acquired finite-lived intangible asset amortization expense		180	$ 186	356	$ 378
Intangible assets, gross, including goodwill		$ 8,600		$ 8,600
Minimum | Revenue Multiple
Finite-Lived Intangible Assets [Line Items]
EBTIDA multiple	1.5
Minimum | EBITDA Multiple
Finite-Lived Intangible Assets [Line Items]
EBTIDA multiple	4.6
Maximum | Revenue Multiple
Finite-Lived Intangible Assets [Line Items]
EBTIDA multiple	4.3
Maximum | EBITDA Multiple
Finite-Lived Intangible Assets [Line Items]
EBTIDA multiple	10.5