Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Millions	Total	Additional Paid-In Capital [Member]	Retained Earnings [Member]
Common stock, shares outstanding	116,766,610
Additional paid-in capital	$ 16.4
Accumulated Other Comprehensive Income (Loss), Net of Tax	(47.3)
Retained earnings	$ 880.7
Common stock issuances	41,941
Common stock repurchases	(524,379)
Performance and restricted stock units issued as common stock	917,828
Common stock issuances	$ 0.7
Common stock repurchases		$ (8.7)	$ 0.0
Performance and restricted stock units expense	16.0
Other Expenses	4.0
Other comprehensive income (loss)	(22.0)
Net Income (Loss) Attributable to Parent	199.7
Dividends paid	(69.1)
Performance and restricted stock units expense (credit)	$ 0.0
Common stock, shares outstanding	117,202,000
Additional paid-in capital	$ 28.4
Accumulated Other Comprehensive Income (Loss), Net of Tax	(69.3)
Retained earnings	1,011.3
Total shareholders’ equity	$ 970.4
Common stock issuances	64,107
Common stock repurchases	(3,288,795)
Performance and restricted stock units issued as common stock	931,364
Common stock issuances	$ 0.8
Common stock repurchases		(36.8)	(5.9)
Performance and restricted stock units expense	20.1
Other Expenses	0.0
Other comprehensive income (loss)	29.3
Net Income (Loss) Attributable to Parent	26.1
Dividends paid	(43.5)
Performance and restricted stock units expense (credit)	$ 0.0
Common stock, shares outstanding	114,908,676
Additional paid-in capital	$ 12.5
Accumulated Other Comprehensive Income (Loss), Net of Tax	(40.0)
Retained earnings	988.0
Total shareholders’ equity	$ 960.5
Common stock issuances	61,360
Common stock repurchases	(4,096,802)
Performance and restricted stock units issued as common stock	1,236,060
Common stock issuances	$ 0.8
Common stock repurchases		$ (28.9)	$ (26.3)
Performance and restricted stock units expense	17.1
Other Expenses	0.0
Other comprehensive income (loss)	(10.6)
Net Income (Loss) Attributable to Parent	4.0
Dividends paid	(62.6)
Performance and restricted stock units expense (credit)	$ (1.8)
Common stock, shares outstanding	112,109,294
Additional paid-in capital	$ 1.5
Accumulated Other Comprehensive Income (Loss), Net of Tax	(50.6)
Retained earnings	901.3
Total shareholders’ equity	$ 852.2