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Stockholders' Equity - Common Share Repurchases, Issuances and Dividends Paid (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Equity, Class of Treasury Stock [Line Items]
Average purchase price per share	$ 15.19	$ 21.42	$ 16.25	$ 16.71
Remaining common stock repurchase authority	$ 685	$ 150	$ 685	$ 150
Shares repurchased related to employee stock-based compensation plans		200,000	1,100,000	3,000,000.0
Average purchase price per share		$ 21.36	$ 17.91	$ 13.59
Common shares issued		600,000	2,400,000	4,800,000
Dividends paid	$ 22	$ 26	$ 69	$ 82
Dividends per share	$ 0.16	$ 0.16	$ 0.48	$ 0.48
Common Stock Shares Outstanding [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock repurchased, shares	6,300,000	7,000,000.0	19,400,000	26,900,000
Common stock repurchased, value	$ 95	$ 150	$ 315	$ 450
Shares repurchased related to employee stock-based compensation plans	5,959	217,158	1,120,438	3,012,396
Common shares issued	3,165	552,194	2,386,817	4,817,906

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