Commitments and contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 29, 2014	Sep. 28, 2013	Mar. 29, 2014	Jun. 28, 2014 Bell Microproducts Inc [Member]	Jun. 30, 2012 Bell Microproducts Inc [Member]
Business Acquisition [Line Items]
Estimate of possible loss					$ 10.0
Range of possible loss, maximum				73.0
Bargain purchase and other	$ 3.0	$ 19.1	$ 22.1