Asset-Backed Financing (Narrative) (Detail)						3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended
	Jun. 29, 2014 Term Asset-Backed Securitization Sold at Premium VIEs [Member] Secured Debt [Member] SPEs [Member] USD ($)	Jun. 30, 2013 Term Asset-Backed Securitization Sold at Premium VIEs [Member] Secured Debt [Member] SPEs [Member] USD ($)	Dec. 31, 2012 Term Asset-Backed Securitization Sold at Premium VIEs [Member] Secured Debt [Member] SPEs [Member] USD ($)	Sep. 28, 2014 Term Asset-Backed Securitization VIEs [Member] Secured Debt [Member] SPEs [Member] USD ($)	Sep. 29, 2013 Term Asset-Backed Securitization VIEs [Member] Secured Debt [Member] SPEs [Member] USD ($)	Sep. 28, 2014 Asset-Backed Canadian Commercial Paper Conduit Facility [Member] Foreign Line of Credit [Member] Variable Interest Entity, Not Primary Beneficiary [Member] USD ($)	Sep. 29, 2013 Asset-Backed Canadian Commercial Paper Conduit Facility [Member] Foreign Line of Credit [Member] Variable Interest Entity, Not Primary Beneficiary [Member] USD ($)	Sep. 28, 2014 Asset-Backed Canadian Commercial Paper Conduit Facility [Member] Foreign Line of Credit [Member] Variable Interest Entity, Not Primary Beneficiary [Member] USD ($)	Sep. 29, 2013 Asset-Backed Canadian Commercial Paper Conduit Facility [Member] Foreign Line of Credit [Member] Variable Interest Entity, Not Primary Beneficiary [Member] USD ($)	Sep. 28, 2014 Asset-Backed Canadian Commercial Paper Conduit Facility [Member] Foreign Line of Credit [Member] Variable Interest Entity, Not Primary Beneficiary [Member] CAD	Sep. 28, 2014 Line of Credit [Member] Asset-Backed Canadian Commercial Paper Conduit Facility [Member] Foreign Line of Credit [Member] Variable Interest Entity, Not Primary Beneficiary [Member] USD ($)	Sep. 29, 2013 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 ($)	Sep. 28, 2014 Line of Credit [Member] Asset-Backed Canadian Commercial Paper Conduit Facility [Member] Foreign Line of Credit [Member] Variable Interest Entity, Not Primary Beneficiary [Member] USD ($)	Sep. 29, 2013 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 ($)	Sep. 28, 2014 Third-party Bank [Member] Line of Credit [Member] Asset-Backed U.S. Commercial Paper Conduit Facility VIE [Member] SPEs [Member] USD ($)	Dec. 31, 2013 Third-party Bank [Member] Line of Credit [Member] Asset-Backed U.S. Commercial Paper Conduit Facility VIE [Member] SPEs [Member] USD ($)	Sep. 29, 2013 Third-party Bank [Member] Line of Credit [Member] Asset-Backed U.S. Commercial Paper Conduit Facility VIE [Member] SPEs [Member] USD ($)
Variable Interest Entity [Line Items]
Company issued secured notes	$ 850,000,000	$ 650,000,000	$ 89,500,000
Unaccreted premium				300,000	500,000
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						48,200,000		48,200,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition						24,400,000	26,300,000	66,500,000	80,200,000
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers											$ 21,400,000	$ 23,100,000	$ 58,200,000	$ 70,100,000