Commitments and Contingencies - Additional Information (Detail) £ in Millions, $ in Millions			1 Months Ended							6 Months Ended	12 Months Ended
	Sep. 30, 2014 USD ($)	Sep. 30, 2014 GBP (£)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2014 GBP (£)	May. 31, 2014 USD ($)	Apr. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Jun. 29, 2013 USD ($)	Jun. 29, 2013 USD ($)	Jan. 02, 2016 USD ($)	Jan. 03, 2015 USD ($)	May. 31, 2014 GBP (£)	Dec. 28, 2013 USD ($)
Operating Leased Assets [Line Items]
Sublease income											$ 1.1
Purchase commitments											223.5
Legal Settlement								$ 3.5
Legal settlement collected			$ 0.5				$ 3.0
Standby letters of credit outstanding											45.6
ABL Facility [Member]
Operating Leased Assets [Line Items]
Standby letters of credit outstanding											45.6	$ 6.9		$ 7.5
Capital Commitments [Member]
Operating Leased Assets [Line Items]
Purchase commitments											$ 7.0
Calypso [Member]
Operating Leased Assets [Line Items]
Deferred consideration										$ 5.1
Calypso [Member] | First Anniversary [Member]
Operating Leased Assets [Line Items]
Deferred consideration									$ 2.3	2.3
Calypso [Member] | Second Anniversary [Member]
Operating Leased Assets [Line Items]
Deferred consideration									$ 2.5	$ 2.5
Aimia Foods Holdings Limited [Member]
Operating Leased Assets [Line Items]
Deferred consideration	$ 33.5	£ 19.9		$ 33.5	£ 19.9	$ 33.5
Contingent consideration maximum payable amount						$ 23.6							£ 16.0