Goodwill, Customer Relationships and Other Intangible Assets - Additional Information (Details) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) segment	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets, gross	$ 8,500			$ 8,500		$ 8,600
Number of reportable segments | segment				1
Goodwill impairment	0	$ 0	$ 2,000	$ 0	$ 1,970
Acquired finite-lived intangible asset amortization expense	$ 177	$ 184		$ 558	$ 540
Maximum | Revenue Multiple
Goodwill [Line Items]
Goodwill impairment, measurement input			4.3
Maximum | EBITDA Multiple
Goodwill [Line Items]
Goodwill impairment, measurement input			10.5
Minimum | Revenue Multiple
Goodwill [Line Items]
Goodwill impairment, measurement input			1.5
Minimum | EBITDA Multiple
Goodwill [Line Items]
Goodwill impairment, measurement input			4.6