Stock-Based Compensation Outstanding Options and SSARs (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2014 years	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Options / SSARs outstanding at January 1, 2014	6,937,000
Incentive shares granted	494,000
Options / SSARs exercised	(3,000)
Options / SSARs cancelled	(375,000)
Options / SSARs outstanding at March 31, 2014	7,053,000
Options / SSARs outstanding Weighted Average Exercise Price	$ 14.17	$ 14.26
SSARs granted Weighted Average Exercise Price	$ 18.09
Options / SSARs exercised Weighted Average Exercise Price	$ 15.27
Options / SSARs cancelled Weighted Average Exercise Price	$ 21.05
Options / SSARs outstanding Weighted Average Contractual Term (in years)	5.0
Options / SSARs outstanding Aggregate Intrinsic Value (in millions)	$ 26.2
Vested and expected to vest	6,701,000
Vested and expected to vest Aggregate Intrinsic Value (in millions)	24.8
Options / SSARs exercisable	6,051,000
Options / SSARs exercisable Weighted Average Exercise Price	$ 13.91
Options / SSARs exercisable Aggregate Intrinsic Value (in millions)	24.2
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Starting Term When Options Become Exercisable After Grant Date	3 months
Employee Stock Option [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of months for options to vest at an incremental rate of ten percent for directors	3 months
Options and SSARs [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Weighted-average period of years costs are expected to be recognied over	1 year 9 months 7 days
Compensation Expense	1.9
Unrecognized compensation costs	$ 6.3
Number of Shares Available for Grant	5,200,000
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Vesting Period	3 years