Earnings Per Share (Narrative) (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Weighted average shares excluded from denominator for diluted earnings per share because the stock options were anti-dilutive	1.0	0.1	0.9	0.7
Restricted stock units issued under stock incentive plan			0.9	1.4
Restricted stock units excluded from the denominator for diluted earnings per share			0.4	0.7