Goodwill, Customer Relationships and Other Intangible Assets - Additional Information (Details) $ in Millions		3 Months Ended	12 Months Ended
	Oct. 31, 2022 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2024 USD ($) reporting_unit	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross (including goodwill)			$ 8,500	$ 8,600
Number of reporting units | reporting_unit			1
Goodwill impairment		$ 2,000	$ 0	1,970	$ 4,638
Weighted average cost of capital (as a percent)	9.40%
After-tax cost of debt (as a percent)	4.80%
Cost of equity (as a percent)	14.00%
Acquired finite-lived intangible asset amortization expense			$ 729	$ 714	$ 744
Acquired finite-lived intangible assets, weighted average useful life			6 years
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, weighted average useful life			6 years
Capitalized software
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, weighted average useful life			4 years
Disposal Group, Held-for-sale | EMEA Business
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill impairment	$ 224
North America Business
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill impairment	$ 4,400
Revenue Multiple
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill impairment, measurement input	2.5
Revenue Multiple | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill impairment, measurement input	1.8	1.5
Revenue Multiple | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill impairment, measurement input	4.6	4.3
EBITDA Multiple
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill impairment, measurement input	7.1
EBITDA Multiple | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill impairment, measurement input	4.7	4.6
EBITDA Multiple | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill impairment, measurement input	10.8	10.5