Consolidated Statements of Changes in Shareholders' Equity Statement - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock, Common
Common stock, shares issued		68,600,000
Common Stock, Value, Issued		$ 42.4
Shares, Issued						(33,300,000)
Stockholders' Equity Attributable to Parent			$ (792.2)	$ (2,831.5)	$ 211.6	$ (1,424.9)
Stock Issued During Period, Shares, New Issues		100,000
Stock Issued During Period, Value, New Issues		$ 0.0
Stock Repurchased During Period, Shares						0
Repurchase of common stock						$ 0.0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition			5.3
Net income	$ 77.4			77.4
Dividends declared (in dollars per share)	$ 0.55
Dividends, Common Stock, Cash				(20.3)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ (9.5)				(9.5)
Common stock, shares issued		68,700,000
Common Stock, Value, Issued		$ 42.4
Shares, Issued						(33,300,000)
Stockholders' Equity Attributable to Parent	$ (2,101.5)		(797.5)	(2,888.6)	202.1	$ (1,424.9)
Common stock, shares issued	68,797,027	68,800,000
Common Stock, Value, Issued	$ 42.5	$ 42.5
Shares, Issued						(33,300,000)
Stockholders' Equity Attributable to Parent	(2,273.0)		(816.1)	(3,009.5)	167.6	$ (1,427.5)
Stock Issued During Period, Shares, New Issues		100,000
Stock Issued During Period, Value, New Issues		$ 0.1
Stock Repurchased During Period, Shares						(100,000)
Repurchase of common stock						$ (4.6)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition			12.7
Net income	$ 74.3			74.3
Dividends declared (in dollars per share)	$ 0.58
Dividends, Common Stock, Cash				(21.4)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 9.8				9.8
Common stock, shares issued	68,946,287	68,900,000
Common Stock, Value, Issued	$ 42.6	$ 42.6
Shares, Issued						(33,400,000)
Stockholders' Equity Attributable to Parent	$ (2,324.3)		$ (828.8)	$ (3,062.4)	$ 177.4	$ (1,432.1)