Segments - Business Segment Information (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Segment Reporting [Abstract]
Revenues		$ 877	$ 863
Operating income		197	253
Depreciation and amortization		130	127
Restructuring charges	[1]	12
Share-based compensation expense		8	7
Other items	[2]	25	1
Adjusted EBITDA	[3]	372	$ 388
Total assets		$ 10,882		$ 10,820

[1] For the three months ended March 31, 2022, restructuring charges primarily consist of real estate consolidation.

[2] For the three months ended March 31, 2022, other items primarily consist of business optimization costs and transaction related costs, including costs related to the Proposed Transaction. For the three months ended March 31, 2021, other items primarily consist of business optimization costs and transaction related costs.

[3] The CODM uses Adjusted EBITDA to measure performance and allocate resources from period to period