CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Millions, unless otherwise specified	Total	Common Stock	Paid-in Capital	Accumulated Other Comprehensive (Loss) Income	Retained Earnings	Treasury Stock	Noncontrolling Interest
Balance at Dec. 31, 2011	$ 1,658.4	$ 0.8	$ 1,222.2	$ 10.1	$ 128.5	$ (1.4)	$ 298.2
Increase (Decrease) in Stockholders' Equity
Issuance of common stock	4.5		4.5
Deferred compensation	2.0		2.0
Other comprehensive (loss) income, net of tax	53.2			48.8			4.4
Net income	89.7				75.8		13.9
Balance at Mar. 31, 2012	1,807.8	0.8	1,228.7	58.9	204.3	(1.4)	316.5
Balance at Dec. 31, 2012	1,909.7	0.8	1,243.1	(14.3)	428.4	(1.4)	253.1
Increase (Decrease) in Stockholders' Equity
Issuance of common stock	4.7		4.7
Deferred compensation	0.9		0.9
Share repurchases	(89.4)					(89.4)
Dividend paid to shareholders ($0.40 per share)	(31.1)		0.5		(31.6)
Distributions to noncontrolling shareholders	(0.1)						(0.1)
Purchase of noncontrolling interest	130.3		(6.9)	(27.6)			(95.8)
Other comprehensive (loss) income, net of tax	(44.8)			(46.1)			1.3
Net income	16.9				18.9		(2.0)
Balance at Mar. 31, 2013	$ 1,636.5	$ 0.8	$ 1,242.3	$ (88.0)	$ 415.7	$ (90.8)	$ 156.5