Finance Receivables (Narrative) (Details) (USD $)	3 Months Ended
	Apr. 01, 2012	Mar. 27, 2011	Dec. 31, 2011	Apr. 01, 2012 Retail [Member]	Dec. 31, 2011 Retail [Member]	Mar. 27, 2011 Retail [Member]	Dec. 31, 2010 Retail [Member]	Apr. 01, 2012 Wholesale [Member]	Dec. 31, 2011 Wholesale [Member]	Mar. 27, 2011 Wholesale [Member]	Apr. 01, 2012 Related To Finance Receivables Held By VIEs [Member]	Mar. 27, 2011 Related To Finance Receivables Held By VIEs [Member]	Apr. 01, 2012 Greater Than 90 Days Past Due [Member] Retail [Member]	Dec. 31, 2011 Greater Than 90 Days Past Due [Member] Retail [Member]	Mar. 27, 2011 Greater Than 90 Days Past Due [Member] Retail [Member]	Apr. 01, 2012 Greater Than 90 Days Past Due [Member] Wholesale [Member]	Dec. 31, 2011 Greater Than 90 Days Past Due [Member] Wholesale [Member]	Mar. 27, 2011 Greater Than 90 Days Past Due [Member] Wholesale [Member]
Financing Receivables [Line Items]
Restricted finance receivables held as collateral	$ 2,520,000,000	$ 2,940,000,000	$ 2,860,000,000
Recorded Investment										5,187,000
FICO score for determining credit risk	640
Allowance for credit losses				112,857,000	116,112,000	141,704,000	157,791,000				57,000,000	82,300,000
Retail financing receivables, gross				5,043,584,000	5,087,490,000	5,225,155,000							16,262,000	27,469,000	25,123,000
Wholesale finance receivables, gross								956,322,000	824,640,000	959,952,000						326,000	909,000	2,698,000
Non-accrual status wholesale finance receivables		$ 5,200,000