CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Millions, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income
Balances at Dec. 31, 2012	$ 1,401.9	$ 1,017.9	$ 233.8	$ 92.3	$ 57.9
Balances (in shares) at Dec. 31, 2012	168,726,984	168,727
Increase (Decrease) in Shareholders' Equity
Amortization of stock-based compensation	3.1		3.1
Stock option exercises (in shares)	0	378
Stock option exercises	0.3	2.9	(2.6)
Settlement of prepaid common stock purchase contracts (in shares)		2,109
Settlement of prepaid common stock purchase contracts	0	7.1	(7.1)
Comprehensive loss:
Net income	(18.3)
Foreign currency translation	(73.9)			0	(73.9)
Total comprehensive (loss) income	(92.2)
Balances at Jun. 30, 2013	$ 1,313.1	$ 1,027.9	$ 227.2	$ 74.0	$ (16.0)
Balances (in shares) at Jun. 30, 2013	171,214,297	171,214