Earnings Per Share - Reconciliation of the Numerators and Denominators of the Earnings Per Share Calculations (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net income attributable to the parent company	$ 57	$ 119	$ 155	$ 241
Weighted-average shares outstanding - Basic	144.0	158.0	146.7	161.6
Employee compensation-related shares, including stock options	0.6	0.9	0.4	1.1
Weighted-average shares outstanding - Diluted	144.6	158.9	147.1	162.7