Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Balance, at beginning of year at Dec. 31, 2012	$ 77.7	$ 76.9	$ 440.8	$ 503.2	$ (388.1)	$ (555.1)
Net earnings	769.2	0.0	0.0	769.2	0.0	0.0
Other comprehensive income (loss)	153.6	0.0	0.0	0.0	0.0	153.6
Dividends	(9.1)	0.0	0.0	(9.1)	0.0	0.0
Compensation plans and other	47.0	0.0	(47.8)	0.0	94.8	0.0
Balance, at end of year at Dec. 31, 2013	1,038.4	76.9	393.0	1,263.3	(293.3)	(401.5)
Net earnings	245.7	0.0	0.0	245.7	0.0	0.0
Other comprehensive income (loss)	(79.0)	0.0	0.0	0.0	0.0	(79.0)
Dividends	(41.7)	0.0	0.0	(41.7)	0.0	0.0
Compensation plans and other	28.1	0.0	2.0	0.0	26.1	0.0
Common stock repurchases	(20.0)	0.0	0.0	0.0	(20.0)	0.0
Balance, at end of year at Dec. 31, 2014	1,171.5	76.9	395.0	1,467.3	(287.2)	(480.5)
Net earnings	241.4	0.0	0.0	241.4	0.0	0.0
Other comprehensive income (loss)	6.4	0.0	0.0	0.0	0.0	6.4
Dividends	(48.3)	0.0	0.0	(48.3)	0.0	0.0
Compensation plans and other	30.3	0.0	13.0	0.0	17.3	0.0
Common stock repurchases	(120.0)	0.0	0.0	0.0	(120.0)	0.0
Balance, at end of year at Dec. 31, 2015	$ 1,281.3	$ 76.9	$ 408.0	$ 1,660.4	$ (389.9)	$ (474.1)