The sum of the tax effects as of the balance sheet date of the amount of excesses of tax deductions over gross income in a year which cannot be used on the tax returns in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset and the tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused tax credit carryforwards which have been reduced by a valuation allowance.

No definition available.

Income Taxes 2 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Tax Expense (Benefit) Continuing Operations Income Tax Reconciliation [Abstract]
Federal statutory provision									$ 144,998	$ 187,103	$ 242,612
State and local income taxes									10,135	5,853	11,109
Foreign tax differential									(41,669)	13,938	(18,037)
Tax exempt income/reimbursement									2,674	2,352	2,748
Federal income tax credits/incentives									10,741	7,580	4,792
Unrealized stock compensation benefits									3,538	15,149	12,852
Medicare subsidy									0	9,070	0
Outside basis differences	0				(15,798)				0	(15,798)	0
Goodwill impairment									31,095
Settlement with taxing authorities	90,227								90,227
Other, net									130	387	(842)
Provision for income taxes	(32,734)	(17,087)	53,012	41,394	50,468	46,880	35,177	73,245	44,585	205,770	240,154
Deferred Tax Liabilities [Abstract]
Depreciation	69,092				49,351				69,092	49,351
Deferred profit (for tax purposes) on sales to finance subsidiaries	157,397				229,364				157,397	229,364
Lease revenue and related depreciation	422,541				480,611				422,541	480,611
Amortization intangibles	99,980				117,207				99,980	117,207
Other	49,044				43,813				49,044	43,813
Deferred tax liabilities	798,054				920,346				798,054	920,346
Deferred Tax Assets Net Abstract
Nonpension postretirement benefits	198,379				104,847				198,379	104,847
Pension	40,956				127,042				40,956	127,042
Inventory and equipment capitalization	24,806				28,546				24,806	28,546
Restructuring charges	8,185				22,348				8,185	22,348
Long-term incentives	37,019				39,781				37,019	39,781
Deferred Tax Assets Operating Loss And Tax Credit Carryforwards	180,281				153,754				180,281	153,754
Tax uncertainties gross-up	46,773				144,672				46,773	144,672
Other	99,996				116,834				99,996	116,834
Valuation allowance	111,438				104,441				111,438	104,441
Deferred tax (asset)	524,957				633,383				524,957	633,383
Net deferred taxes	273,097				286,963				273,097	286,963
Amounts included in current income tax (assets) and liabilities	$ 97,153				$ 25,845				$ 97,153	$ 25,845