Earnings Per Share ("EPS") - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator:
Net income	$ 10	$ 14	$ 18	$ 20	$ 14	$ 2	$ 42	$ 36
Less: net income attributable to participating securities								(1)
Net income attributable to the Company's stockholders	$ 10			$ 20			$ 42	$ 35
Denominator:
Weighted-average common shares outstanding, basic	108,796,947			108,402,136			108,702,139	108,252,926
Effect of dilutive securities	337,384			643,371			467,610	313,348
Weighted average diluted common shares outstanding	109,134,331			109,045,507			109,169,749	108,566,274
Basic	$ 0.09			$ 0.18			$ 0.38	$ 0.33
Diluted	$ 0.09			$ 0.18			$ 0.38	$ 0.33