Schedule of Details of Dividend Payments (Detail) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Jul. 02, 2015	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Equity [Abstract]
Record Date		Mar. 31, 2016	Dec. 30, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Payment Date		Apr. 29, 2016	Jan. 29, 2016	Oct. 30, 2015	Jul. 31, 2015	Apr. 24, 2015	Jan. 30, 2015
Amount per Share		$ 0.29	$ 0.29	$ 0.29	$ 0.29	$ 0.28	$ 0.28
Total Amount		$ 43	$ 43	$ 43	$ 43	$ 42	$ 42
Maximum dividend allowed prior to merger	$ 0.29