Unaudited Condensed Consolidated Statements Of Shareholders' Equity - USD ($) $ in Millions	Total	Common shares	Treasury shares	Accumulated Other Comprehensive Loss	Retained earnings
Balance, at beginning of period at Dec. 31, 2014	$ 3,778.2	$ 408.0	$ (143.1)	$ 0.0	$ 3,513.3
Net income	124.4				124.4
Dividends	(21.5)				(21.5)
Stock compensation	(1.1)		12.3		(13.4)
Share repurchases	(50.9)		(50.9)
Shares cancelled	0.0	(1.9)	19.4		(17.5)
Foreign currency translation adjustment	0.0
Balance, at end of period at Mar. 31, 2015	3,829.1	406.1	(162.3)	0.0	3,585.3
Balance, at beginning of period at Dec. 31, 2015	3,532.5	386.7	(155.1)	(9.3)	3,310.2
Net income	74.1				74.1
Dividends	(23.4)				(23.4)
Stock compensation	(0.9)		8.8		(9.7)
Share repurchases	(50.0)		(50.0)
Shares cancelled	0.0	(11.6)	50.0		(38.4)
Foreign currency translation adjustment	3.1			3.1
Balance, at end of period at Mar. 31, 2016	$ 3,535.4	$ 375.1	$ (146.3)	$ (6.2)	$ 3,312.8