Consolidated Statements of Equity (Deficit) - USD ($) $ in Millions	Total	Common Stock and Paid-in Capital	Retained Earnings (Accumulated Deficit)	Treasury Stock	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Balance at Dec. 31, 2012	$ 319.8	$ 537.3	$ (240.3)	$ (16.8)	$ 29.7	$ 9.9
Increase (Decrease) in Stockholders' Equity Roll Forward
Net income	257.7	0.0	256.1	0.0	0.0	1.6
Cash paid for repurchases of common stock	0.0
Stock based compensation	13.4	13.4	0.0	0.0	0.0	0.0
Exercise of stock options	34.4	17.6	0.0	16.8	0.0	0.0
Purchase of noncontrolling interest	0.0
Tax benefit related to stock plans	(35.4)	(35.4)	0.0	0.0	0.0	0.0
Shares issued	1.3	1.3	0.0	0.0	0.0	0.0
Other comprehensive loss	(20.0)	0.0	0.0	0.0	(19.1)	(0.9)
Balance at Dec. 31, 2013	571.2	534.2	15.8	0.0	10.6	10.6
Increase (Decrease) in Stockholders' Equity Roll Forward
Net income	277.3	0.0	276.3	0.0	0.0	1.0
Cash paid for repurchases of common stock	(469.5)	0.1	0.0	469.4	0.0	0.0
Stock based compensation	12.5	12.5	0.0	0.0	0.0	0.0
Exercise of stock options	23.4	(16.8)	0.0	40.2	0.0	0.0
Purchase of noncontrolling interest	(12.4)	6.1	0.0	0.0	0.0	6.3
Tax benefit related to stock plans	1.2	1.2	0.0	0.0	0.0	0.0
Shares issued	1.9	1.9	0.0	0.0	0.0	0.0
Other comprehensive loss	(36.6)	0.0	0.0	0.0	(34.4)	(2.2)
Balance at Dec. 31, 2014	369.0	526.8	292.1	(429.2)	(23.8)	3.1
Increase (Decrease) in Stockholders' Equity Roll Forward
Net income	144.9	0.0	144.2	0.0	0.0	0.7
Cash paid for repurchases of common stock	(301.5)	0.0	0.0	301.5	0.0	0.0
Stock based compensation	13.0	13.0	0.0	0.0	0.0	0.0
Exercise of stock options	26.9	(45.4)	0.0	72.3	0.0	0.0
Purchase of noncontrolling interest	0.0	0.7	0.0	0.0	0.0	(0.7)
Tax benefit related to stock plans	1.9	1.9	0.0	0.0	0.0	0.0
Shares issued	1.1	1.1	0.0	0.0	0.0	0.0
Other comprehensive loss	(42.8)	0.0	0.0	0.0	(43.0)	0.2
Balance at Dec. 31, 2015	$ 212.5	$ 496.7	$ 436.3	$ (658.4)	$ (66.8)	$ 4.7