Consolidated Statements of Changes in Shareholders Equity (USD $) In Millions, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Stockholders' Equity, Total [Member]
Balance at Dec. 31, 2010		$ 1.4	$ 983.6	$ (75.3)	$ 900.7	$ 1,810.4
Balance, shares at Dec. 31, 2010		142,098,702
Net (loss) income	192.4				192.4	192.4
Employee equity awards, shares		909,244
Employee equity awards, value			12.4			12.4
Stock forfeitures, shares		(221,165)
Stock Forfeitures, value			(1.2)			(1.2)
Excess tax benefits from share-based payment arrangements			1.1			1.1
SERP shares issued		78,862
Other Comprehensive Income	(50.9)			(50.9)		(50.9)
Balance at Dec. 31, 2011		1.4	995.9	(126.2)	1,093.1	1,964.2
Balance, shares at Dec. 31, 2011	142,900,000	142,865,643
Net (loss) income	34.8				34.8	34.8
Employee equity awards, shares		905,438
Employee equity awards, value			15.3			15.3
Stock forfeitures, shares		(123,439)
Stock Forfeitures, value			0			0
Excess tax benefits from share-based payment arrangements			1.1			1.1
SERP shares issued		49,536
Other Comprehensive Income	(19.0)			(19.0)		(19.0)
Balance at Dec. 31, 2012	1,996.4	1.4	1,012.3	(145.2)	1,127.9	1,996.4
Balance, shares at Dec. 31, 2012	143,700,000	143,697,178
Net (loss) income	(621.4)				(621.4)	(621.4)
Equity in joint venture					2.2	2.2
Employee equity awards, shares		1,979,066
Employee equity awards, value			12.6			12.6
Stock forfeitures, shares		(668,263)
Net shares settled		(240,359)
Excess tax benefits from share-based payment arrangements			0.1			0.1
SERP shares issued		30,501
Other Comprehensive Income	90.6			90.6		90.6
Balance at Dec. 31, 2013	$ 1,480.5	$ 1.4	$ 1,025.0	$ (54.6)	$ 508.7	$ 1,480.5
Balance, shares at Dec. 31, 2013	144,800,000	144,798,123