Net Income Per Share - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Nov. 02, 2016	Jun. 30, 2016	May 01, 2013	Apr. 30, 2013
Schedule Of Earnings Per Share [Line Items]
Common Stock, Shares, Outstanding	46,304,139
Class of Warrant or Right, Outstanding	4,877,617
Number of new common stock issued	46,477,068	45,865,081
Common Stock, Par or Stated Value Per Share							$ 0.01
Exercise price of common stock						$ 16.67
Warrant exercised	132	34	0
Stock Issued During Period, Shares, New Issues	4	8	0
First Warrant Buyback Authorization Dollars					$ 10
SecondWarrantBuyBackAuthorizedDollars				$ 10
RemainingWarrantBuyBackAuthorizedDollars	$ 12
Net Income (Loss) Available to Common Stockholders, Basic	$ (28)	$ (437)	$ (216)
Common Stock [Member]
Schedule Of Earnings Per Share [Line Items]
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	495,000