Income Taxes (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
Income Tax Reconciliation, Deductions, Medicare Prescription Drug Benefit Subsidy											$ 9,000,000
U.S.									458,456,000	463,814,000	407,060,000
International									146,157,000	22,727,000	149,129,000
Income from continuing operations before income taxes	147,768,000	137,701,000	158,115,000	161,029,000	22,999,000	160,942,000	162,563,000	140,037,000	604,613,000	486,541,000	556,189,000
Income Tax Expense (Benefit) [Abstract]
U.S. Federal: Current									174,705,000	(68,505,000)	175,827,000
U.S. Federal: Deferred									16,136,000	135,305,000	(24,632,000)
U.S. Federal: Total									190,841,000	66,800,000	151,195,000
U.S. State and Local: Current									3,187,000	33,922,000	27,169,000
U.S. State and Local: Deferred									(26,273,000)	(15,546,000)	(17,518,000)
U.S. State and Local: Total									(23,086,000)	18,376,000	9,651,000
International: Current									65,412,000	67,835,000	44,989,000
International: Deferred									(82,862,000)	(85,401,000)	7,763,000
International: Total									(17,450,000)	(17,566,000)	52,752,000
Total current									243,304,000	33,252,000	247,985,000
Total deferred									(92,999,000)	34,358,000	(34,387,000)
Total provision for income taxes	44,224,000	37,823,000	52,765,000	15,493,000	(32,170,000)	2,038,000	54,190,000	43,552,000	150,305,000	67,610,000	213,598,000
Effective tax rate									24.8597%	13.89605%	38.40385%
Tax benefit related to foreign tax									47,000,000	90,000,000
Tax Accrual For Repatriation Of Foreign Earnings									43,000,000
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal statutory provision									211,614,000	170,289,000	194,668,000
State and local income taxes									1,694,000	16,327,000	14,729,000
Income Tax Reconciliation, Non US Leveraged Lease Asset Sales									(30,367,000)	(31,423,000)	0
Tax Benefit From Sale Of Non U S Leverage Lease									32,000,000	34,000,000
Impact of foreign operations									22,699,000	16,388,000	13,556,000
Tax exempt income/reimbursement									(1,992,000)	(2,674,000)	(2,352,000)
Federal income tax credits/incentives									(8,918,000)	(10,741,000)	(7,580,000)
Unrealized stock compensation benefits									3,456,000	3,538,000	15,149,000
Income Tax Reconciliation Settlement With Taxing Authorities									(47,380,000)	(94,225,000)	(8,230,000)
U.S. health care reform tax change									0	0	9,070,000
Outside basis differences	0				0				0	0	15,798,000
Other, net									(501,000)	131,000	386,000
Provision for income taxes	44,224,000	37,823,000	52,765,000	15,493,000	(32,170,000)	2,038,000	54,190,000	43,552,000	150,305,000	67,610,000	213,598,000
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities: Depreciation	(65,205,000)				(69,092,000)				(65,205,000)	(69,092,000)
Deferred tax liabilities: Deferred profit (for tax purposes) on sale to finance subsidiary	(157,279,000)				(157,397,000)				(157,279,000)	(157,397,000)
Deferred tax liabilities: Lease revenue and related depreciation	(306,612,000)				(422,541,000)				(306,612,000)	(422,541,000)
Deferred tax liabilities: Amortizable intangibles	(104,156,000)				(99,980,000)				(104,156,000)	(99,980,000)
Deferred tax liabilities: Other	(35,157,000)				(49,044,000)				(35,157,000)	(49,044,000)
Deferred tax liabilities	(668,409,000)				(798,054,000)				(668,409,000)	(798,054,000)
Deferred Tax Assets, Net [Abstract]
Deferred tax assets: Nonpension postretirement benefits	119,002,000				198,379,000				119,002,000	198,379,000
Deferred tax assets: Pension	117,509,000				40,956,000				117,509,000	40,956,000
Deferred tax assets: Inventory and equipment capitalization	26,778,000				24,806,000				26,778,000	24,806,000
Deferred tax assets: Restructuring charges	20,793,000				8,185,000				20,793,000	8,185,000
Deferred tax assets: Long-term incentives	35,056,000				37,019,000				35,056,000	37,019,000
Deferred tax assets: Net operating loss and tax dredit carry forwards	194,134,000				180,281,000				194,134,000	180,281,000
Deferred tax assets: Tax uncertainties gross-up	28,492,000				46,773,000				28,492,000	46,773,000
Deferred tax assets: Other	89,406,000				99,996,000				89,406,000	99,996,000
Deferred tax assets: Valuation allowance	(142,176,000)				(111,438,000)				(142,176,000)	(111,438,000)
Deferred tax assets	488,994,000				524,957,000				488,994,000	524,957,000
Total deferred taxes, net	(179,415,000)				(273,097,000)				(179,415,000)	(273,097,000)
Operating Loss Carryforwards	339,000,000								339,000,000
Cumulative Undistributed Earnings of Foreign Subsidiaries	750,000,000								750,000,000
Withholding Taxes On Undistributed Earnings of Foreign Subsidiaries	10,000,000								10,000,000
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year				198,635,000				531,790,000	198,635,000	531,790,000	515,565,000
Increases from prior period positions									11,811,000	67,065,000	17,775,000
Decreases from prior period positions									(17,985,000)	(140,107,000)	(27,669,000)
Increases from current period positions									28,255,000	28,686,000	43,804,000
Decreases from current period positions									0	0	(8,689,000)
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities									(1,948,000)	(18,204,000)	(1,434,000)
Reductions from lapse of applicable statute of limitations									(71,863,000)	(270,595,000)	(7,562,000)
Balance at end of year	146,905,000				198,635,000				146,905,000	198,635,000	531,790,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense									(28,000,000)	(83,000,000)	15,000,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 11,000,000				$ 67,000,000				$ 11,000,000	$ 67,000,000