Earnings Per Share and Shareholders Equity Transactions (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share and Shareholders’ Equity Transactions [Abstract]
Antidilutive securities excluded from calculation of earnings per share	0.2	0.7	0.2	0.7
Repurchases common stock, authorized	$ 900.0		$ 900.0
Repurchases common stock, shares			0.8
Repurchases common stock, value			$ 67.5