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		67,500,000
Common Stock, Value, Issued		$ 41.8
Shares, Issued			(32,700,000)
Stockholders' Equity Attributable to Parent			$ (1,364.5)	$ (720.1)	$ (2,601.3)	$ 163.6
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				10.7
Net income	$ 133.5				133.5
Dividends, Common Stock, Cash					(52.8)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(3.4)					(3.4)
Common stock, shares issued		67,700,000
Common Stock, Value, Issued		$ 41.8
Shares, Issued			(32,700,000)
Stockholders' Equity Attributable to Parent			$ (1,364.5)	(728.8)	(2,651.7)	182.5
Stock Issued During Period, Shares, New Issues		0
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				2.0
Net income	47.9				47.9
Dividends, Common Stock, Cash					(17.6)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(22.3)					(22.3)
Common stock, shares issued		67,700,000
Common Stock, Value, Issued		$ 41.9
Shares, Issued			(32,700,000)
Stockholders' Equity Attributable to Parent	$ (1,930.0)		$ (1,364.5)	(730.8)	(2,682.0)	160.2
Common stock, shares issued	67,751,074	67,800,000
Common Stock, Value, Issued	$ 41.9	$ 41.9
Shares, Issued			(32,700,000)
Stockholders' Equity Attributable to Parent	(1,957.4)		$ (1,364.5)	(735.4)	(2,682.1)	137.5
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(0.9)
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			$ (0.4)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition				26.3
Net income	82.1				82.1
Dividends, Common Stock, Cash					(55.3)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent						33.5
Stockholders' Equity Attributable to Parent	171.0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(0.8)
Common stock, shares issued		68,200,000
Common Stock, Value, Issued		$ 42.2
Shares, Issued			(32,700,000)
Stockholders' Equity Attributable to Parent	153.0		$ (1,364.5)	(759.4)	(2,687.3)	153.0
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			$ (0.4)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition				2.3
Net income	40.1				40.1
Dividends, Common Stock, Cash					(18.5)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ (0.9)					18.0
Common stock, shares issued	68,186,431	68,200,000
Common Stock, Value, Issued	$ 42.2	$ 42.2
Shares, Issued			(32,700,000)
Stockholders' Equity Attributable to Parent	$ (1,976.9)		$ (1,364.9)	$ (761.7)	$ (2,708.9)	$ 171.0