Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended	0 Months Ended
	Jan. 30, 2015	Jan. 30, 2015	Mar. 04, 2015
Tax Year 2008
Gain Contingencies
Recovery of excessive taxes and interest	$ 0.2	$ 0.7
Minimum | Reduction in Taxes | Tax Years 2007 - 2014
Gain Contingencies
Potential aggregate recovery	2.8	2.8
Maximum | Reduction in Taxes | Tax Years 2007 - 2014
Gain Contingencies
Potential aggregate recovery	4.0	4.0
Subsequent Event
Gain Contingencies
Recovery of excessive taxes and interest			4.0
Subsequent Event | Tax Years 2005 - 2006
Gain Contingencies
Recovery of excessive taxes and interest			1.6
Subsequent Event | Selling and Administrative Costs | Tax Years 2007, 2009 and 2010
Gain Contingencies
Recovery of excessive taxes and interest			$ 1.6