Fair Value Of Financial Instruments (Summary Of Fair Value And Carrying Value Of Company Financial Instruments) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jul. 01, 2012
Assets:
Restricted cash	$ 212,004	$ 188,008	$ 188,564
Fair Value [Member]
Assets:
Cash equivalents	1,300,690	1,068,138	1,071,496
Marketable securities	133,631	135,634	135,848
Accounts receivable, net	253,819	230,079	250,268
Derivatives	11,214	317	8,879
Finance receivables, net	6,314,282	5,861,442	6,099,619
Restricted cash	212,004	188,008	188,564
Liabilities:
Accounts payable	344,423	257,386	252,239
Derivatives	570	7,920	2,042
Unsecured commercial paper	525,745	294,943	845,868
Global credit facilities	0	0	143,792
Asset-backed Canadian commercial paper conduit facility	175,229	175,658	0
Medium-term notes	3,100,162	3,199,548	2,967,112
Senior unsecured notes	325,705	338,594	360,791
Term asset-backed securitization debt	1,673,645	1,457,807	1,345,452
Carrying Value [Member]
Assets:
Cash equivalents	1,300,690	1,068,138	1,071,496
Marketable securities	133,631	135,634	135,848
Accounts receivable, net	253,819	230,079	250,268
Derivatives	11,214	317	8,879
Finance receivables, net	6,225,586	5,781,852	6,016,569
Restricted cash	212,004	188,008	188,564
Liabilities:
Accounts payable	344,423	257,386	252,239
Derivatives	570	7,920	2,042
Unsecured commercial paper	525,745	294,943	845,868
Global credit facilities	0	0	143,792
Asset-backed Canadian commercial paper conduit facility	175,229	175,658	0
Medium-term notes	2,858,638	2,881,272	2,698,359
Senior unsecured notes	303,000	303,000	303,000
Term asset-backed securitization debt	$ 1,673,759	$ 1,447,776	$ 1,339,232