Consolidated Statements of Changes in Shareholders' Equity Statement - USD ($) $ in Millions	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
Common stock, shares issued		67,800,000
Common Stock, Value, Issued		$ 41.9
Shares, Issued			(32,700,000)
Stockholders' Equity Attributable to Parent			$ (1,364.5)	$ (735.4)	$ (2,682.1)	$ 137.5
Stock Issued During Period, Shares, New Issues		400,000
Stock Issued During Period, Value, New Issues		$ 0.3
Stock Repurchased During Period, Shares			0
Repurchase of common stock			$ 0.0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition				24.0
Net income	$ 42.0				42.0
Dividends declared (in dollars per share)	$ 1.00
Dividends, Common Stock, Cash					(36.8)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 15.5					15.5
Common stock, shares issued		68,100,000
Common Stock, Value, Issued		$ 42.1
Shares, Issued			(32,700,000)
Stockholders' Equity Attributable to Parent			$ (1,364.5)	(753.1)	(2,700.3)	171.0
Stock Issued During Period, Shares, New Issues		100,000
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				6.3
Net income	$ 5.5				5.5
Dividends declared (in dollars per share)	$ 0.50
Dividends, Common Stock, Cash					(18.5)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ (18.0)					(18.0)
Common stock, shares issued		68,200,000
Common Stock, Value, Issued		$ 42.2
Shares, Issued			(32,700,000)
Stockholders' Equity Attributable to Parent	$ (1,971.4)		$ (1,364.5)	(759.4)	(2,687.3)	153.0
Common stock, shares issued	68,254,574	68,300,000
Common Stock, Value, Issued	$ 42.2	$ 42.2
Shares, Issued			(32,800,000)
Stockholders' Equity Attributable to Parent	(2,019.2)		$ (1,377.7)	(763.8)	(2,751.5)	160.6
Stock Issued During Period, Shares, New Issues		200,000
Stock Issued During Period, Value, New Issues		$ 0.2
Stock Repurchased During Period, Shares			(400,000)
Repurchase of common stock			$ (42.2)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition				20.9
Net income	$ 78.4				78.4
Dividends declared (in dollars per share)	$ 1.04
Dividends, Common Stock, Cash					(38.3)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 56.7					56.7
Common stock, shares issued		68,500,000
Common Stock, Value, Issued		$ 42.4
Shares, Issued			(32,900,000)
Stockholders' Equity Attributable to Parent			$ (1,386.7)	(781.5)	(2,808.1)	184.5
Stock Issued During Period, Shares, New Issues		0
Stock Issued During Period, Value, New Issues		$ 0.0
Stock Repurchased During Period, Shares			(300,000)
Repurchase of common stock			$ (33.2)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition				3.2
Net income	$ 2.6				2.6
Dividends declared (in dollars per share)	$ 0.52
Dividends, Common Stock, Cash					(19.1)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 32.8					32.8
Common stock, shares issued	68,534,447	68,500,000
Common Stock, Value, Issued	$ 42.4	$ 42.4
Shares, Issued			(33,200,000)
Stockholders' Equity Attributable to Parent	$ (1,981.5)		$ (1,419.9)	$ (784.7)	$ (2,791.6)	$ 217.3