CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDER'S EQUITY - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Noncontrolling Interest [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 1,428.4
Common stock, shares issued	88.4
Common Stock, Value, Issued		$ 88.4
Retained earnings	$ 1,789.2
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (451.2)			$ (451.2)
Noncontrolling interests					$ 2.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Activity from Stock Incentive Plans		0.7
Share Repurchases	(0.8)	(0.9)
Activity from Stock Incentive Plans, Additional Paid in Capital	$ 30.6	$ 0.7	$ 29.9	0.0	0.0
Share Repurchases, Value	(32.9)	(0.9)	(32.0)	0.0	0.0
Cumulative Effect of Accounting Change	1.0	0.0	1.0	0.0	0.0
Net Income (Loss)	113.3	0.0	113.5	0.0	(0.2)
Dividends Declared	(45.5)	0.0	(45.5)	0.0	0.0
Total Other Comprehensive Income (Loss), Net of Tax	103.0	0.0	0.0	103.0	0.0
Other	(0.1)	$ 0.0	0.0	0.0	(0.1)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,597.8
Common stock, shares issued		88.2
Common Stock, Value, Issued		$ 88.2
Retained earnings			1,856.1
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (348.2)			(348.2)
Noncontrolling interests					1.7
Activity from Stock Incentive Plans		0.5
Share Repurchases	(1.0)	(1.1)
Activity from Stock Incentive Plans, Additional Paid in Capital	$ 27.5	$ 0.5	27.0	0.0	0.0
Share Repurchases, Value	(56.1)	(1.1)	(55.0)	0.0	0.0
Cumulative Effect of Accounting Change	(4.1)	0.0	(4.1)	0.0	0.0
Net Income (Loss)	334.6	0.0	333.7	0.0	0.9
Dividends Declared	(47.4)	0.0	(47.4)	0.0	0.0
Total Other Comprehensive Income (Loss), Net of Tax	(27.3)	0.0	0.0	(27.3)	0.0
Other	(0.1)	$ 0.0	0.0	0.0	(0.1)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 1,824.9
Common stock, shares issued	87.6	87.6
Common Stock, Value, Issued	$ 87.6	$ 87.6
Retained earnings	2,110.3		2,110.3
Accumulated Other Comprehensive Income (Loss), Net of Tax	(375.5)			(375.5)
Noncontrolling interests	$ 2.5				2.5
Activity from Stock Incentive Plans		1.0
Share Repurchases	(0.5)	(0.8)
Activity from Stock Incentive Plans, Additional Paid in Capital	$ 30.6	$ 1.0	29.6	0.0	0.0
Share Repurchases, Value	(41.4)	(0.8)	(40.6)	0.0	0.0
Net Income (Loss)	326.2	0.0	325.1	0.0	1.1
Dividends Declared	(52.0)	0.0	(52.0)	0.0	0.0
Dividend to Noncontrolling Interest	(0.7)	0.0	0.0	0.0	(0.7)
Total Other Comprehensive Income (Loss), Net of Tax	(9.8)	$ 0.0	0.0	(9.8)	0.0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 2,077.8
Common stock, shares issued	87.8	87.8
Common Stock, Value, Issued	$ 87.8	$ 87.8
Retained earnings	2,372.4		$ 2,372.4
Accumulated Other Comprehensive Income (Loss), Net of Tax	(385.3)			$ (385.3)
Noncontrolling interests	$ 2.9				$ 2.9