Goodwill, Customer Relationships and Other Intangible Assets - Additional Information (Details) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment	$ 0	$ 2,000	$ 0	$ 1,970	$ 0
Acquired finite-lived intangible asset amortization expense	184		$ 187	540	$ 565
Intangible assets, gross, including goodwill	$ 8,700			$ 8,700
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