Commitments and Contingencies - Narrative (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended		3 Months Ended	9 Months Ended		0 Months Ended
	Oct. 26, 2014 Cycleo [Member]	Jan. 26, 2014 Cycleo [Member]	Oct. 26, 2014 Unfavorable Regulatory Action	Oct. 26, 2014 Unfavorable Regulatory Action	Oct. 28, 2012 Unfavorable Regulatory Action	Nov. 13, 2014 Subsequent Event [Member] Commercial Dispute
Loss Contingencies [Line Items]
Range of possible loss, minimum			$ 2.7	$ 2.7
Range of possible loss, maximum			5.7	5.7
Environmental loss contingency accrual, at carrying value			2.7	2.7	2.5
Additional loss recognized			0.2	0.2
Potential payments under earn-out arrangements, high estimate	16.0
Potential payments under earn-out arrangements, payout period beginning April 30, 2012	4 years
Cumulative earn-out liability	0	0.9
Loss contingency, damages sought						$ 2.7