Income Taxes (Details) (USD $)	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 Disclosure Details [Abstract]
Income from continuing operations before income taxes - US									$ 408,934,000	$ 390,911,000	$ 552,636,000
Income from continuing operations before income taxes - International									5,347,000	143,666,000	140,540,000
Income from continuing operations before income taxes Total	21,086,000	99,845,000	159,176,000	134,174,000	127,858,000	142,944,000	103,767,000	160,008,000	414,281,000	534,577,000	693,176,000
Changes in deferred taxes and effective tax rates [Abstract]
Effective Income Tax Rate Continuing Operations									10.80%	38.50%	34.60%
Tax benefit from retirement of intercompany obligations											(13,000,000)
U.S Federal: [Abstract]
Current									(87,713,000)	170,175,000	188,272,000
Deferred									135,305,000	(24,632,000)	18,979,000
US Federal Total									47,592,000	145,543,000	207,251,000
U.S. State and Local: [Abstract]
Current									31,726,000	26,523,000	30,981,000
Deferred									(15,546,000)	(17,518,000)	(13,067,000)
US State and Local Total									16,180,000	9,005,000	17,914,000
International; [Abstract]
Current									66,214,000	43,459,000	31,848,000
Deferred									(85,401,000)	7,763,000	(16,859,000)
International Total									(19,187,000)	51,222,000	14,989,000
Total Current									10,227,000	240,157,000	251,101,000
Deferred taxes									34,358,000	(34,387,000)	(10,947,000)
Total provision for income taxes	(32,734,000)	(17,087,000)	53,012,000	41,394,000	50,468,000	46,880,000	35,177,000	73,245,000	44,585,000	205,770,000	240,154,000
Operating Loss Carryforwards	286,000,000				266,000,000				286,000,000	266,000,000
Cumulative Undistributed Earnings of Foreign Subsidiaries	940,000,000								940,000,000
Withholding Taxes On Undistributed Earnings of Foreign Subsidiaries	17,000,000								17,000,000
Rollforward of Unrecognized Tax Benefits
Balance at beginning of year				531,790,000				515,565,000	531,790,000	515,565,000	434,164,000
Increases from prior period positions									67,065,000	17,775,000	65,540,000
Deacreases from prior period period postions									140,107,000	27,669,000	7,741,000
Increases from current period positions									28,686,000	43,804,000	42,696,000
Decreases from current period positions									0	8,689,000	0
Decreases relating to settlements with tax authorities									18,204,000	1,434,000	3,173,000
Reductions as a result of a lapse of the applicable statute of limitations.									270,595,000	7,562,000	15,921,000
Balance at end of year	198,635,000				531,790,000				198,635,000	531,790,000	515,565,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	170,000,000				434,000,000				170,000,000	434,000,000	411,000,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense									(83,000,000)	15,000,000	32,000,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	67,000,000				202,000,000				67,000,000	202,000,000
Tax Benefit From Sale Of Non U S Leverage Lease									$ 34,000,000