CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Mar. 31, 2013	Dec. 31, 2012	Apr. 01, 2012
Current assets:
Cash and cash equivalents	$ 1,018,759,000	$ 1,068,138,000	$ 1,276,337,000
Marketable securities	135,246,000	135,634,000	134,946,000
Accounts receivable, net	259,673,000	230,079,000	264,272,000
Finance receivables, net	2,074,036,000	1,743,045,000	1,885,489,000
Inventories	416,050,000	393,524,000	467,941,000
Other current assets	232,190,000	292,508,000	237,550,000
Total current assets	4,332,979,000	4,050,936,000	4,513,530,000
Finance receivables, net	3,959,903,000	4,038,807,000	3,991,914,000
Property, plant and equipment, net	790,245,000	815,464,000	791,064,000
Goodwill	28,861,000	29,530,000	29,740,000
Other long-term assets	223,133,000	236,036,000	279,099,000
Total assets	9,335,121,000	9,170,773,000	9,605,347,000
Current liabilities:
Accounts payable	360,018,000	257,386,000	355,902,000
Accrued liabilities	464,317,000	513,591,000	577,619,000
Short-term Debt	687,705,000	294,943,000	629,143,000
Current portion of long-term debt	715,143,000	437,162,000	1,020,563,000
Current portion of long-term debt held by variable interest entities			1,020,563,000
Total current liabilities	2,227,183,000	1,503,082,000	2,583,227,000
Long-term debt	3,892,469,000	4,370,544,000	3,918,384,000
Pension liability	152,132,000	330,294,000	118,212,000
Postretirement healthcare liability	274,597,000	278,062,000	265,871,000
Other long-term liabilities	131,692,000	131,167,000	144,994,000
Total shareholders' equity	2,657,048,000	2,557,624,000	2,574,659,000
Total liabilities and shareholders' equity	9,335,121,000	9,170,773,000	9,605,347,000
Restricted Cash and Cash Equivalents	197,025,000	188,008,000	246,995,000
Variable Interest Entity, Primary Beneficiary [Member]
Current assets:
Finance receivables, net	432,079,000	470,134,000	546,350,000
Other current assets	5,229,000	5,288,000	5,932,000
Finance receivables, net	1,402,541,000	1,631,435,000	1,971,878,000
Current liabilities:
Current portion of long-term debt	375,835,000	399,477,000	620,624,000
Long-term debt	892,737,000	1,048,299,000	1,133,696,000
Restricted Cash and Cash Equivalents	$ 185,657,000	$ 176,290,000	$ 246,995,000