Fair Value Measurements - Financial Assets and Liabilities Measured on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Millions		Mar. 31, 2022	Dec. 31, 2021
Assets:
Asset		$ 30	$ 31
Liabilities:
Liabilities		28	46
Deferred Compensation Liabilities
Liabilities:
Liabilities	[1]	23	24
Interest Rate Swap Arrangements Pertaining to Other Current Liabilities
Liabilities:
Liabilities	[2]	2	4
Interest Rate Swap Arrangements Pertaining to Other Non-current Liabilities
Liabilities:
Liabilities	[2]	3	18
Plan Assets for Deferred Compensation
Assets:
Asset	[3]	23	24
Investment in Mutual Funds
Assets:
Asset	[4]	1	1
Warrant
Assets:
Asset	[5]	6	6
Level 1
Assets:
Asset		24	25
Liabilities:
Liabilities		23	24
Level 1 | Deferred Compensation Liabilities
Liabilities:
Liabilities	[1]	23	24
Level 1 | Plan Assets for Deferred Compensation
Assets:
Asset	[3]	23	24
Level 1 | Investment in Mutual Funds
Assets:
Asset	[4]	1	1
Level 2
Liabilities:
Liabilities		5	22
Level 2 | Interest Rate Swap Arrangements Pertaining to Other Current Liabilities
Liabilities:
Liabilities	[2]	2	4
Level 2 | Interest Rate Swap Arrangements Pertaining to Other Non-current Liabilities
Liabilities:
Liabilities	[2]	3	18
Level 3
Assets:
Asset		6	6
Level 3 | Warrant
Assets:
Asset	[5]	$ 6	$ 6

[1] The Company offers certain employees the opportunity to participate in a deferred compensation plan. A participant’s deferrals are invested in a variety of participant directed stock and bond mutual funds and are classified as equity securities. Changes in the fair value of these securities are measured using quoted prices in active markets based on the market price per unit multiplied by the number of units held exclusive of any transaction costs. A corresponding adjustment for changes in fair value of the equity securities is also reflected in the changes in fair value of the deferred compensation obligation.

[2] Derivative financial instruments include interest rate swap arrangements recorded at fair value based on externally-developed valuation models that use readily observable market parameters and the consideration of counterparty risk.

[3] Plan assets are comprised of investments in mutual funds, which are intended to fund liabilities arising from deferred compensation plans. These investments are carried at fair value, which is based on quoted market prices at period end in active markets. These investments are classified as equity securities with any gains or losses resulting from changes in fair value recorded in other income/(expense), net in the condensed consolidated statement of operations.

[4] Investments in mutual funds are money-market accounts held with the intention of funding certain specific retirement plans.

[5] The warrant to purchase equity interests in the company that, following the Connect Transaction, owns Global Connect, which was issued on March 5, 2021 in connection with the Connect Transaction (the “Connect Warrant”), was part of the proceeds related to the sale of Global Connect and included in the net gain on sale of Global Connect. The Connect Warrant is marked-to-market each reporting period with the subsequent change in fair value recorded to other income/(expense), net in the consolidated statement of operations. The Connect Warrant is reported within other non-current assets within the consolidated balance sheet. The fair value of the Connect Warrant asset is estimated using a Black-Scholes option-pricing model.