Finance Receivables (Narrative) (Details) (USD $)	9 Months Ended
	Sep. 25, 2011	Jun. 26, 2011	Dec. 31, 2010	Sep. 26, 2010
Financing Receivables [Line Items]
Restricted finance receivables held as collateral	$ 2,710,000,000		$ 3,380,000,000	$ 3,100,000,000
FICO score for determining credit risk	640
Allowance for credit losses, ending balance	132,619,000	144,404,000	173,589,000	181,985,000
Retail [Member]
Financing Receivables [Line Items]
Receivables past due and accruing interest	23,300,000		34,100,000
Allowance for credit losses, ending balance	124,980,000	130,948,000	157,791,000
Wholesale [Member]
Financing Receivables [Line Items]
Recorded Investment	0		5,423,000
Receivables past due and accruing interest	600,000		1,600,000
Allowance for credit losses, ending balance	7,639,000	13,456,000	15,798,000
Related To Finance Receivables Held By VIEs [Member]
Financing Receivables [Line Items]
Allowance for credit losses, ending balance	$ 64,700,000