Asset-Backed Financing (Narrative) (Detail)		3 Months Ended			3 Months Ended
	Mar. 29, 2015 Secured Notes Through One Term Asset-backed Securitization Transaction [Member] Secured Debt [Member] USD ($)	Mar. 29, 2015 Asset-Backed Canadian Commercial Paper Conduit Facility [Member] Foreign Line of Credit [Member] Variable Interest Entity, Not Primary Beneficiary [Member] USD ($)	Mar. 30, 2014 Asset-Backed Canadian Commercial Paper Conduit Facility [Member] Foreign Line of Credit [Member] Variable Interest Entity, Not Primary Beneficiary [Member] USD ($)	Mar. 29, 2015 Asset-Backed Canadian Commercial Paper Conduit Facility [Member] Foreign Line of Credit [Member] Variable Interest Entity, Not Primary Beneficiary [Member] CAD	Mar. 29, 2015 Line of Credit [Member] Asset-Backed Canadian Commercial Paper Conduit Facility [Member] Foreign Line of Credit [Member] Variable Interest Entity, Not Primary Beneficiary [Member] USD ($)	Mar. 30, 2014 Line of Credit [Member] Asset-Backed Canadian Commercial Paper Conduit Facility [Member] Foreign Line of Credit [Member] Variable Interest Entity, Not Primary Beneficiary [Member] USD ($)	Mar. 29, 2015 Third-party Bank [Member] Line of Credit [Member] Asset-Backed U.S. Commercial Paper Conduit Facility VIE [Member] SPEs [Member] USD ($)	Dec. 31, 2014 Third-party Bank [Member] Line of Credit [Member] Asset-Backed U.S. Commercial Paper Conduit Facility VIE [Member] SPEs [Member] USD ($)	Mar. 30, 2014 Third-party Bank [Member] Line of Credit [Member] Asset-Backed U.S. Commercial Paper Conduit Facility VIE [Member] SPEs [Member] USD ($)
Variable Interest Entity [Line Items]
Company issued secured notes	$ 700,000,000
Line of Credit Facility, Current Borrowing Capacity				200,000,000			600,000,000
Debt Instrument, Term		5 years
Borrowings outstanding under conduit facility							0	0	0
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount		24,700,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition		19,200,000	15,700,000
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers					$ 16,800,000	$ 13,800,000