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		68,300,000
Common Stock, Value, Issued		$ 42.2
Shares, Issued						(32,800,000)
Stockholders' Equity Attributable to Parent			$ (763.8)	$ (2,751.5)	$ 160.6	$ (1,377.7)
Stock Issued During Period, Shares, New Issues		200,000
Stock Issued During Period, Value, New Issues		$ 0.2
Stock Repurchased During Period, Shares						(500,000)
Repurchase of common stock						$ (47.2)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition			24.1
Net income	$ 107.5			107.5
Dividends declared (in dollars per share)	$ 1.56
Dividends, Common Stock, Cash				(57.3)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 106.0				106.0
Common stock, shares issued		68,500,000
Common Stock, Value, Issued		$ 42.4
Shares, Issued						(33,200,000)
Stockholders' Equity Attributable to Parent			(784.7)	(2,791.6)	217.3	$ (1,419.9)
Stock Issued During Period, Shares, New Issues		0
Stock Issued During Period, Value, New Issues		$ 0.0
Stock Repurchased During Period, Shares						(100,000)
Repurchase of common stock						$ (5.0)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition			3.2
Net income	$ 29.1			29.1
Dividends declared (in dollars per share)	$ 0.52
Dividends, Common Stock, Cash				(19.0)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 49.3				49.3
Common stock, shares issued		68,500,000
Common Stock, Value, Issued		$ 42.4
Shares, Issued						(33,300,000)
Stockholders' Equity Attributable to Parent	$ (1,940.5)		(787.9)	(2,801.7)	266.6	$ (1,424.9)
Common stock, shares issued	68,575,974	68,600,000
Common Stock, Value, Issued	$ 42.4	$ 42.4
Shares, Issued						(33,300,000)
Stockholders' Equity Attributable to Parent	(2,029.6)		(792.2)	(2,831.5)	211.6	$ (1,424.9)
Stock Issued During Period, Shares, New Issues		200,000
Stock Issued During Period, Value, New Issues		$ 0.1
Stock Repurchased During Period, Shares						0
Repurchase of common stock						$ 0.0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition			20.9
Net income	$ 193.2			193.2
Dividends declared (in dollars per share)	$ 1.65
Dividends, Common Stock, Cash				(61.0)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 8.3				8.3
Common stock, shares issued		68,800,000
Common Stock, Value, Issued		$ 42.5
Shares, Issued						(33,300,000)
Stockholders' Equity Attributable to Parent			(807.8)	(2,931.6)	178.1	$ (1,424.9)
Stock Issued During Period, Shares, New Issues		0
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	$ 52.5			52.5
Dividends declared (in dollars per share)	$ 0.55
Dividends, Common Stock, Cash				(20.4)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 41.8				41.8
Common stock, shares issued	68,787,424	68,800,000
Common Stock, Value, Issued	$ 42.5	$ 42.5
Shares, Issued						(33,300,000)
Stockholders' Equity Attributable to Parent	$ (2,174.5)		$ (813.1)	$ (2,963.7)	$ 219.9	$ (1,424.9)