Long-Term Incentive Employee Compensation - Long-Term Incentive Employee Compensation Costs (Parenthetical) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Transformation costs	$ 0.2	$ 0.5	$ 4.7
Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Transformation costs			$ 8.3