Income Taxes - Income before income taxes and noncontrolling interests (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
U.S. income before income taxes	$ 68	$ 198	$ 130
Foreign income before income taxes	368	254	271
Earnings before income taxes and noncontrolling interests	$ 436	$ 452	$ 401