Stock-Based Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares available for issuance under the 2011 Plan (in shares)	5,932,577		5,932,577
Stock options, granted (in shares)			922,348
Stock options, weighted average exercise price (in dollars per share)			$ 29.71
Stock options, vesting period (in years)			4 years
Stock options, expiration period (in years)			10 years
Stock options, weighted average grant date fair value (in dollars per share)			$ 5.73
Assumptions used in Black-Scholes model
Risk-free interest rate (in hundredths)			0.89%
Expected life (in years)			6 years
Stock volatility (in hundredths)			22.50%
Dividend yield (in hundredths)			1.30%
Granted, PVS awards (in shares)			176,952
Grant date fair value, PVS awards (in dollars per share)			$ 29.71
Number of shares of common stock per PVS award (in shares)	1		1
Performance period for the annual growth rate of revenue and return on invested capital targets to be achieved			3 years
PVS payout, Minimum (in hundredths)	0.00%		0.00%
PVS payout, Maximum (in hundredths)	200.00%		200.00%
Stock-based compensation expense	$ 5.2	$ 4.4	$ 15.6	$ 11.8