Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) Segment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Significant Accounting Policies [Line Items]
Number of operating segments | Segment	1
Contract with customer, assets	$ 20	$ 20
Reimbursements from customers	192	204	$ 205
Impairments of goodwill	0	0	0
Net transaction losses	$ (30)	$ (25)	$ (29)
Minimum
Significant Accounting Policies [Line Items]
Other intangible assets, useful lives	3 years
Maximum
Significant Accounting Policies [Line Items]
Other intangible assets, useful lives	25 years