Fair Value Of Financial Instruments (Summary Of The Fair Value And Carrying Value Of The Company's Financial Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Apr. 01, 2012	Dec. 31, 2011	Mar. 27, 2011	Dec. 31, 2010
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 1,276,337	$ 1,526,950	$ 932,515	$ 1,021,933
Marketable securities	134,946	153,380	115,209
Accounts receivable, net	264,272	219,039	297,671
Restricted cash held by variable interest entities	246,995	229,655	294,903
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1,276,337	1,526,950	932,515
Marketable securities	134,946	153,380	115,209
Accounts receivable, net	264,272	219,039	297,671
Derivatives	6,345	16,443	18
Finance receivables, net	5,961,825	5,888,040	6,105,350
Restricted cash held by variable interest entities	246,995	229,655	294,903
Accounts payable	355,902	255,713	292,676
Derivatives	2,234	5,136	24,787
Unsecured commercial paper	662,343	874,286	488,493
Credit facilities	150,195	159,794	217,651
Medium-term notes	2,936,475	2,561,458	2,514,092
Senior unsecured notes	366,651	376,513	406,961
Term asset-backed securitization debt	1,768,140	2,099,060	2,366,270
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1,276,337	1,526,950	932,515
Marketable securities	134,946	153,380	115,209
Accounts receivable, net	264,272	219,039	297,671
Derivatives	6,345	16,443	18
Finance receivables, net	5,877,403	5,786,681	6,025,423
Restricted cash held by variable interest entities	246,995	229,655	294,903
Accounts payable	355,902	255,713	292,676
Derivatives	2,234	5,136	24,787
Unsecured commercial paper	662,343	874,286	488,493
Credit facilities	150,195	159,794	217,651
Medium-term notes	2,698,232	2,298,193	2,347,624
Senior unsecured notes	303,000	303,000	303,000
Term asset-backed securitization debt	$ 1,754,320	$ 2,087,346	$ 2,324,763