Condensed Consolidated Statements Of Shareholders' Equity (USD $) In Millions, except Share data	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings (Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at beginning of year at Dec. 31, 2010	$ 0.6	$ 1,451.2	$ (35.3)	$ (325.7)	$ 1,090.8
Common stock shares, beginning balance at Dec. 31, 2010	58,070,807
Stock Issuance	114,603
Share-based employee compensation		4.0			4.0
Earnings			13.5		13.5
Other comprehensive income				15.8	15.8
Balance at Mar. 31, 2011	0.6	1,455.2	(21.8)	(309.9)	1,124.1
Common stock shares, ending balance at Mar. 31, 2011	58,185,410
Balance at beginning of year at Dec. 31, 2011	0.6	1,467.5	77.1	(415.0)	1,130.2
Common stock shares, beginning balance at Dec. 31, 2011	58,424,691
Stock Issuance	337,368				58,762,059
Share-based employee compensation		11.4			11.4
Earnings			18.2		18.2
Dividend		(412.9)	(95.3)		(508.2)
Other comprehensive income				5.4	5.4
Balance at Mar. 31, 2012	$ 0.6	$ 1,066.0		$ (409.6)	$ 657.0
Common stock shares, ending balance at Mar. 31, 2012	58,762,059