Finance Receivables (Aging Of Past Due Finance Receivables Including Non-Accrual Status Finance Receivables) (Details) (USD $) In Thousands, unless otherwise specified	Apr. 01, 2012	Dec. 31, 2011	Mar. 27, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	$ 5,999,906	$ 5,912,130	$ 6,185,107
Retail [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	5,043,584	5,087,490	5,225,155
Wholesale [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	956,322	824,640	959,952
Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	5,886,232	5,738,321	6,015,348
Current [Member] | Retail [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	4,930,739	4,915,711	5,059,870
Current [Member] | Wholesale [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	955,493	822,610	955,478
31-60 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	75,914	108,150	108,352
31-60 Days Past Due [Member] | Retail [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	75,560	107,373	107,471
31-60 Days Past Due [Member] | Wholesale [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	354	777	881
61-90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	21,172	37,281	33,586
61-90 Days Past Due [Member] | Retail [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	21,023	36,937	32,691
61-90 Days Past Due [Member] | Wholesale [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	149	344	895
Greater Than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	16,588	28,378	27,821
Greater Than 90 Days Past Due [Member] | Retail [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	16,262	27,469	25,123
Greater Than 90 Days Past Due [Member] | Wholesale [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	326	909	2,698
Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	113,674	173,809	169,759
Total Past Due [Member] | Retail [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	112,845	171,779	165,285
Total Past Due [Member] | Wholesale [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance receivables, gross	$ 829	$ 2,030	$ 4,474