Earnings Per Share (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Numerator:
Income (Loss) from Continuing Operations Attributable to Parent	$ (10.9)	$ 34.5	$ 105.6	$ 141.5
Less Undistributed Earnings (Loss) Allocated to Nonvested Stock	0	0	0	0.1
Net income available to common shareholders for basic earnings per share and diluted earnings per share	$ (10.9)	$ 34.5	$ 105.6	$ 141.4
Denominator:
Weighted Average Number of Shares Outstanding, Basic	89,683,436	94,667,659	90,889,871	95,391,695
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0	740,410	820,157	856,516
Weighted average number of shares outstanding, assuming dilution of stock options and awards	89,683,436	95,408,069	91,710,028	96,248,211
Income (Loss) from Continuing Operations, Per Basic Share	$ (0.12)	$ 0.36	$ 1.16	$ 1.48
Income (Loss) from Continuing Operations, Per Diluted Share	$ (0.12)	$ 0.36	$ 1.15	$ 1.47