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	4.6		4.6
Stock option exercises (in shares)	0	616
Stock option exercises	1.0	3.9	(2.9)
Tax benefit on issuance of tangible equity units	1.6		1.6
Tax benefit of stock option exercises	(0.3)		(0.3)
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	(4.5)
Foreign currency translation	(44.5)			0	(44.5)
Total comprehensive (loss) income	(49.0)
Balances at Sep. 30, 2013	$ 1,359.8	$ 1,028.9	$ 229.7	$ 87.8	$ 13.4
Balances (in shares) at Sep. 30, 2013	171,452,069	171,452