Fair Value Of Financial Instruments (Summary Of Fair Value And Carrying Value Of Company Financial Instruments) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2013	Dec. 31, 2012	Sep. 30, 2012
Assets:
Restricted cash	$ 194,329	$ 188,008	$ 217,400
Fair Value [Member]
Assets:
Cash equivalents	1,029,955	1,068,138	1,795,141
Marketable securities	122,234	135,634	136,376
Accounts receivable, net	290,158	230,079	256,193
Derivatives	1,733	317	1,639
Finance receivables, net	6,266,406	5,861,442	5,993,713
Restricted cash	194,329	188,008	217,400
Liabilities:
Accounts payable	326,713	257,386	293,710
Derivatives	1,152	7,920	2,458
Unsecured commercial paper	394,460	294,943	404,693
Asset-backed Canadian commercial paper conduit facility	180,584	175,658	176,855
Medium-term notes	3,092,947	3,199,548	3,623,082
Senior unsecured notes	315,927	338,594	357,328
Term asset-backed securitization debt	1,447,710	1,457,807	1,702,320
Carrying Value [Member]
Assets:
Cash equivalents	1,029,955	1,068,138	1,795,141
Marketable securities	122,234	135,634	136,376
Accounts receivable, net	290,158	230,079	256,193
Derivatives	1,733	317	1,639
Finance receivables, net	6,184,890	5,781,852	5,915,667
Restricted cash	194,329	188,008	217,400
Liabilities:
Accounts payable	326,713	257,386	293,710
Derivatives	1,152	7,920	2,458
Unsecured commercial paper	394,460	294,943	404,693
Asset-backed Canadian commercial paper conduit facility	180,584	175,658	176,855
Medium-term notes	2,858,809	2,881,272	3,297,687
Senior unsecured notes	303,000	303,000	303,000
Term asset-backed securitization debt	$ 1,446,656	$ 1,447,776	$ 1,692,065