Stockholders' Equity - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 28, 2019	Sep. 30, 2018
Class of Stock [Line Items]
Dividends per common share	$ 0.16	$ 0.16	$ 0.32	$ 0.32
Common stock dividends paid	$ 37,000,000	$ 42,000,000	$ 76,000,000	$ 85,000,000
Authorized share repurchased program amount						$ 500,000,000
Common Stock [Member]
Class of Stock [Line Items]
Closing price of common stock					$ 13.65
Authorized common share repurchased program remaining available amount	$ 207,000,000		$ 207,000,000
Common Stock Shares Outstanding [Member]
Class of Stock [Line Items]
Common stock repurchased	9,617,008		19,034,252	0
Purchase price of common stock repurchased on open market	$ 126,000,000		$ 233,000,000