Earnings Per Share and Equity Summary of Share Repurchase Program (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Equity [Abstract]
Number of repurchased shares	13,900,000	[1]	8,800,000	[1]
Aggregate purchase price	$ 101.3		$ 55.3
Fees, commissions and other expenses	0.3		0.2
Less: accrued share repurchases	(0.6)	[2]	0	[2]
Total cash used for share repurchases	101.0		55.5
Weighted-average purchase price per share	$ 7.29		$ 6.26
Available for future purchases at period end	$ 143.4		$ 244.7
Shares reissued or retired	0

[1] None of these shares had been reissued or retired as of December 31, 2013, but may be reissued or retired by the Company at a later date.

[2] Represents unpaid amounts recorded in accrued expenses on the Company's Consolidated Balance Sheet.