Earnings (Loss) Per Share - Summary of Computation Earnings (Loss) Per Common Share Using Two Class Method (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ 30	$ (7)	$ 21	$ (8)	$ 23	$ 13
Less income attributable to Preferred Stock			(21)			(13)
Less stock dividend attributable to Series B Preferred Stock	(11)				(22)
Net income (loss) attributable to common shareholders - basic	$ 15		$ 18		$ 1	$ 11
Weighted average shares outstanding - basic	233,104,873		201,281,939		232,670,986	196,782,691
Income (loss) per common share - basic	$ 0.06		$ 0.09		$ 0.01	$ 0.06
Diluted earnings (loss) per common share:
Net income (loss)	$ 30	$ (7)	$ 21	$ (8)	$ 23	$ 13
Less income attributable to Preferred Stock			(21)			(13)
Less stock dividend attributable to Series B Preferred Stock	(11)				(22)
Net income (loss) attributable to common shareholders - diluted	$ 17		$ 18		$ 1	$ 11
Weighted average shares outstanding - basic	233,104,873		201,281,939		232,670,986	196,782,691
Dilutive securities:
RSUs, PSUs, and stock options	297,797		660,735		367,863	2,302,651
Shares issuable upon conversion of Series B Preferred Stock	32,520,000				32,520,000
Shares issuable pursuant to the annual Series A Preferred Stock dividend			4,435,765			3,409,844
Weighted average shares outstanding - diluted	265,922,670		206,378,439		265,558,849	202,495,186
Income (loss) per common share - diluted	$ 0.06		$ 0.09		$ 0.01	$ 0.06
Series A Preferred Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Less income attributable to Preferred Stock	$ (2)		$ (3)			$ (2)
Diluted earnings (loss) per common share:
Less income attributable to Preferred Stock	(2)		$ (3)			$ (2)
Series B Preferred Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Less income attributable to Preferred Stock	(2)
Diluted earnings (loss) per common share:
Less income attributable to Preferred Stock	$ (2)