Earnings per Share and Share Repurchases (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options excluded from computation of earnings per share due to net loss, including options with higher exercise prices than average market price	11.9		13.2	18.4
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		17.2
Stock repurchased during the period, shares			0.4	0.6
Stock repurchased during the period, value			$ 3.0	$ 9.4