Commitments and Contingencies (Details) In Millions, unless otherwise specified		9 Months Ended	12 Months Ended		9 Months Ended
	Oct. 01, 2012 Subsequent events USD ($)	Sep. 30, 2012 CRA CAD	Dec. 31, 2008 CRA CAD	Dec. 31, 2010 CRA CAD	Sep. 30, 2012 Environmental Remediation Matters USD ($)	Sep. 30, 2012 Environmental Remediation Matters Maximum USD ($)
Commitments and Contingencies
First portion of cleanup costs to be borne by the former owner						$ 1.5
Second portion of cleanup costs to be shared by the entity and former owner, percentage					50.00%
Second portion of cleanup costs to be shared by the entity and former owner equally					1.0
Cleanup costs, in excess of specified amount, to be borne by the former owner					2.5
Entity's share of financial responsibility					0.5
Loss contingencies, liability paid					0.4
Remaining entity's share of financial responsibility liability					0.1
Time frame to monitor the site					20 years
Amount of assessed withholding tax and interest			0.8
Loss contingency reserve				0.8
Loss contingency reserve removed		0.8
Total purchase price of S-64F aircrane and aircrane support parts under Aircraft Purchase Agreement	$ 21.75