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		300,000
Stock Issued During Period, Value, New Issues		$ 0.2
Stock Repurchased During Period, Shares			0
Repurchase of common stock			$ 0.0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition				17.7
Net income	$ 36.5				36.5
Dividends declared (in dollars per share)	$ 0.50
Dividends, Common Stock, Cash					(18.3)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 33.5					33.5
Common stock, shares issued		68,100,000
Common Stock, Value, Issued		$ 42.1
Shares, Issued			(32,700,000)
Stockholders' Equity Attributable to Parent	$ (1,960.0)		$ (1,364.5)	(753.1)	(2,700.3)	171.0
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			(100,000)
Repurchase of common stock			$ (9.0)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition				17.7
Net income	$ 75.8				75.8
Dividends declared (in dollars per share)	$ 0.52
Dividends, Common Stock, Cash					(19.2)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 23.9					23.9
Common stock, shares issued	68,533,697	68,500,000
Common Stock, Value, Issued	$ 42.4	$ 42.4
Shares, Issued			(32,900,000)
Stockholders' Equity Attributable to Parent	$ (2,060.8)		$ (1,386.7)	$ (781.5)	$ (2,808.1)	$ 184.5