Stock-Based Compensation Performance Based Restricted Stock Units (Details) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Performance Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Performance Share Unit Award Number	0.7
Share Based Payment Award, Vesting Period	3 years
Share Based Compensation Arrangement By Share Based Payment Award Performance Share Unit Additional Units Granted Minimum Percentage	0.00%
Share Based Compensation Arrangement By Share Based Payment Award Performance Share Unit Additional Units Granted Maximum Percentage	200.00%
Share Based Compensation Arrangement By Share Based Payment Award Performance Share Unit Threshold Award Level Nonvested Number	2.0
Share Based Compensation Arrangement By Share Based Payment Award Performance Share Unit Award Level Nonvested At Period End Number	1.8
Share Based Compensation Arrangement By Share Based Payment Award Performance Share Unit Outstanding At Threshold	100.00%
Stock Price Based RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Price Based Restricted Stock Unit Awards, Outstanding At Period End, Market Condition Met	0.2	0.3
Stock Price Based Restricted Stock Unit Awards, Vested, Market Condition Met	0.1