Asset-Backed Financing (Assets And Liabilities Of Variable Interest Entities) (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Dec. 31, 2013	Mar. 31, 2013
Financing Receivable [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	$ 1,422,002	$ 1,773,210	$ 2,045,839
Financing Receivable [Member] | Asset-backed Securities [Member] | SPEs [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	1,221,855	1,569,118	1,871,419
Financing Receivable [Member] | Asset-backed U.S. Commercial Paper Conduit Facility [Member] | SPEs [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	0	0	0
Financing Receivable [Member] | Asset-Backed Canadian Commercial Paper Conduit Facility [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	200,147	204,092	174,420
Allowance for Credit Loss [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount	(28,255)	(35,139)	(39,722)
Allowance for Credit Loss [Member] | Asset-backed Securities [Member] | SPEs [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount	(24,998)	(31,778)	(36,799)
Allowance for Credit Loss [Member] | Asset-backed U.S. Commercial Paper Conduit Facility [Member] | SPEs [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount	0	0	0
Allowance for Credit Loss [Member] | Asset-Backed Canadian Commercial Paper Conduit Facility [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount	(3,257)	(3,361)	(2,923)
Restricted Cash [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	117,883	144,807	197,025
Restricted Cash [Member] | Asset-backed Securities [Member] | SPEs [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	105,536	133,053	185,657
Restricted Cash [Member] | Asset-backed U.S. Commercial Paper Conduit Facility [Member] | SPEs [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	0	0	0
Restricted Cash [Member] | Asset-Backed Canadian Commercial Paper Conduit Facility [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	12,347	11,754	11,368
Other Assets [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	3,625	4,738	5,396
Other Assets [Member] | Asset-backed Securities [Member] | SPEs [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	3,083	3,720	4,935
Other Assets [Member] | Asset-backed U.S. Commercial Paper Conduit Facility [Member] | SPEs [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	304	429	294
Other Assets [Member] | Asset-Backed Canadian Commercial Paper Conduit Facility [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	238	589	167
Assets, Total [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	1,515,255	1,887,616	2,208,538
Assets, Total [Member] | Asset-backed Securities [Member] | SPEs [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	1,305,476	1,674,113	2,025,212
Assets, Total [Member] | Asset-backed U.S. Commercial Paper Conduit Facility [Member] | SPEs [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	304	429	294
Assets, Total [Member] | Asset-Backed Canadian Commercial Paper Conduit Facility [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	209,475	213,074	183,032
Asset-backed debt [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	1,261,337	1,430,873	1,423,168
Asset-backed debt [Member] | Asset-backed Securities [Member] | SPEs [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	1,096,633	1,256,632	1,268,572
Asset-backed debt [Member] | Asset-backed U.S. Commercial Paper Conduit Facility [Member] | SPEs [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	0	0	0
Asset-backed debt [Member] | Asset-Backed Canadian Commercial Paper Conduit Facility [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount	$ 164,704	$ 174,241	$ 154,596