CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Statement of Other Comprehensive Income [Abstract]
Revenues	$ 35,345	$ 33,679	$ 32,563
Net operating expenses
Cost of services and products (exclusive of depreciation and amortization included below)	20,841	19,015	17,492
Selling, general and administrative	9,765	9,592	9,438
Severance, exit costs and asset impairments	298	106	133
Depreciation, Depletion and Amortization	6,543	4,858	6,248
Other, net	(282)	0	(153)
Total costs and expenses	37,165	33,571	33,158
Operating income (loss)	(1,820)	108	(595)
Other (expense) income
Interest expense	(1,428)	(1,011)	(1,464)
Equity in losses of unconsolidated investments, net	(1,114)	(1,730)	(1,286)
Other (expense) income, net	190	(3)	46
Nonoperating Income (Expense)	(2,352)	(2,744)	(2,704)
Loss before income taxes	(4,172)	(2,636)	(3,299)
Income tax expense (benefit)	(154)	(254)	(166)
Net loss	(4,326)	(2,890)	(3,465)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(4)	2	(8)
Unrealized holding gains (losses) on securities:
Unrealized holding gains (losses) on securities	5	6	0
Less: reclassification adjustment for realized (gains) losses included in net loss	(3)	(4)	(3)
Net unrealized holding gains (losses) on securities	2	2	(3)
Unrecognized net periodic pension and other postretirement benefits:
Actuarial Net (Gains) Losses	(404)	(349)	(171)
Less: Amortization of actuarial gain/loss and prior service cost included in net loss	65	55	32
Net unrecognized net periodic pension and other postretirement benefits	(339)	(294)	(139)
Other comprehensive income (loss)	(341)	(290)	(150)
Comprehensive loss	$ (4,667)	$ (3,180)	$ (3,615)
Basic and diluted loss per common share	$ (1.44)	$ (0.96)	$ (1.16)
Basic and diluted weighted average common shares outstanding	3,002	2,995	2,988