Description of Business, Basis of Presentation and Significant Accounting Policies - Activities Relating to Capitalized Software (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Movement in Capitalized Computer Software, Net [Roll Forward]
Amortization	$ 0	$ 0	$ (23)
Internal-Use Software
Movement in Capitalized Computer Software, Net [Roll Forward]
Beginning balance at January 1	10	13	13
Capitalized	3	3	7
Amortization	(5)	(6)	(7)
Ending balance at December 31	8	10	13
External-Use Software
Movement in Capitalized Computer Software, Net [Roll Forward]
Beginning balance at January 1	0	0	23
Capitalized	0	0	0
Amortization	0	0	(23)
Ending balance at December 31	$ 0	$ 0	$ 0