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	$ 1,824.9
Common stock, shares issued	87.6
Common Stock, Value, Issued		$ 87.6
Retained earnings	$ 2,110.3
Accumulated Other Comprehensive Income (Loss), Net of Tax	(375.5)			$ (375.5)
Noncontrolling interests					$ 2.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Activity from Stock Incentive Plans		1.0
Share Repurchases		(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
Common Stock, Value, Issued		$ 87.8
Retained earnings			2,372.4
Accumulated Other Comprehensive Income (Loss), Net of Tax	(385.3)			(385.3)
Noncontrolling interests					2.9
Activity from Stock Incentive Plans		0.6
Share Repurchases		(1.9)
Activity from Stock Incentive Plans, Additional Paid in Capital	17.7	$ 0.6	17.1	0.0	0.0
Share Repurchases, Value	(84.2)	(1.9)	(82.3)	0.0	0.0
Cumulative adjustment for accounting change	(1.2)	0.0	(1.2)	0.0	0.0
Net Income (Loss)	73.9	0.0	72.5	0.0	1.4
Dividends Declared	(58.9)	0.0	(58.9)	0.0	0.0
Dividend to Noncontrolling Interest	(0.9)	0.0	0.0	0.0	(0.9)
Payments to Acquire Additional Interest in Subsidiaries	2.2	0.0	0.3	0.0	1.9
Total Other Comprehensive Income (Loss), Net of Tax	105.9	$ 0.0	0.0	105.9	0.0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 2,127.9
Common stock, shares issued	86.5	86.5
Common Stock, Value, Issued	$ 86.5	$ 86.5
Retained earnings	2,319.3		2,319.3
Accumulated Other Comprehensive Income (Loss), Net of Tax	(279.4)			(279.4)
Noncontrolling interests	1.5				1.5
Activity from Stock Incentive Plans		0.3
Share Repurchases		(1.3)
Activity from Stock Incentive Plans, Additional Paid in Capital	17.7	$ 0.3	17.4	0.0	0.0
Share Repurchases, Value	(116.5)	(1.3)	(115.2)	0.0	0.0
Net Income (Loss)	321.0	0.0	316.3	0.0	4.7
Dividends Declared	(76.2)	0.0	(76.2)	0.0	0.0
Dividend to Noncontrolling Interest	(1.4)	0.0	0.0	0.0	(1.4)
Total Other Comprehensive Income (Loss), Net of Tax	(41.9)	0.0	0.0	(41.9)	0.0
Other	0.1	$ 0.0	0.0	0.0	0.1
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 2,230.7
Common stock, shares issued	85.5	85.5
Common Stock, Value, Issued	$ 85.5	$ 85.5
Retained earnings	2,461.6		$ 2,461.6
Accumulated Other Comprehensive Income (Loss), Net of Tax	(321.3)			$ (321.3)
Noncontrolling interests	$ 4.9				$ 4.9