Consolidated Statements Of Operations (USD $) Share data in Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statement of Operations [Abstract]
Revenues	$ 14,245,000,000	$ 14,060,000,000	$ 13,015,000,000
Expenses:
Operating	8,367,000,000	8,985,000,000	8,700,000,000
Selling, general and administrative	2,755,000,000	2,615,000,000	2,488,000,000
Restructuring charges (Note 3)	46,000,000	81,000,000	23,000,000
Impairment charges (Note 2)	0	0	210,000,000
Depreciation and amortization	548,000,000	563,000,000	583,000,000
Total expenses	11,716,000,000	12,244,000,000	12,004,000,000
Operating Income (Loss)	2,529,000,000	1,816,000,000	1,011,000,000
Interest expense	(436,000,000)	(529,000,000)	(542,000,000)
Interest income	7,000,000	6,000,000	6,000,000
Gain (loss) on early extinguishment of debt (Note 7)	0	(81,000,000)	(30,000,000)
Other items, net	(17,000,000)	10,000,000	(2,000,000)
Earnings (loss) before income taxes and equity in earnings (loss) of investee companies	2,083,000,000	1,222,000,000	443,000,000
(Provision) benefit for income taxes	(755,000,000)	(463,000,000)	(183,000,000)
Equity in loss of investee companies, net of tax	(37,000,000)	(35,000,000)	(33,000,000)
Net earnings (loss) from continuing operations	1,291,000,000	724,000,000	227,000,000
Discontinued operations (Note 1):
Earnings (loss) from discontinued operations before income taxes	23,000,000	0	0
(Provision) benefit for income taxes for discontinued operations	(9,000,000)	0	0
Net earnings (loss) from discontinued operations	14,000,000	0	0
Net earnings (loss)	$ 1,305,000,000	$ 724,000,000	$ 227,000,000
Basic net earnings (loss) per common share:
Basic net earnings (loss) from continuing operations (in dollars per share)	$ 1.94	$ 1.07	$ 0.34
Basic net earnings (loss) from discontinued operations (in dollars per share)	$ 0.02	$ 0	$ 0
Basic net earnings (loss) per common share (in dollars per share)	$ 1.97	$ 1.07	$ 0.34
Diluted net earnings (loss) per common share:
Diluted net earnings (loss) from continuing operations (in dollars per share)	$ 1.90	$ 1.04	$ 0.33
Diluted net earnings (loss) from discontinued operations (in dollars per share)	$ 0.02	$ 0	$ 0
Diluted net earnings (loss) per common share (in dollars per share)	$ 1.92	$ 1.04	$ 0.33
Weighted average number of common shares outstanding:
Basic weighted average number of common shares outstanding	664	679	674
Diluted weighted average number of common shares outstanding	681	694	683
Dividends per common share (in dollars per share)	$ 0.35	$ 0.20	$ 0.20