Earnings per Share and Share Repurchases (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 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			13.9	19.0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	12.2	17.7
Stock repurchased during the period, shares			0.3	0.6
Stock repurchased during the period, value			$ 2.5	$ 9.0