Stockholder's Equity (Schedule of Accumulated Other Comprehensive Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive loss, beginning balance			$ (8,646)	$ (8,750)
Other Comprehensive Income (Loss), before reclassification adjustment	(14)	(412)	(223)	(242)
Other Comprehensive Income (Loss) Before Reclassification Adjustments			(165)	(243)
Other comprehensive income amounts reclassified from accumulated other comprehensive income (loss)			267	250
Accumulated Other Comprehensive loss, ending balance	(8,544)	(8,743)	(8,544)	(8,743)
Cumulative Translation Adjustment [Member]
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive loss, beginning balance			(167)	(244)
Other Comprehensive Income (Loss), before reclassification adjustment			(223)	(242)
Cumulative translation adjustment reclassified from accumulated other comprehensive income (loss)			0	0
Accumulated Other Comprehensive loss, ending balance	(390)	(486)	(390)	(486)
Net Revaluation and Clearance of Cash Flow Hedges to Earnings
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive loss, beginning balance			3	41
Other Comprehensive Income (Loss), before reclassifications, of cash flow hedges			(15)	20
CF hedges reclassified from accumulated other comprehensive income (loss)			(17)	(32)
Accumulated Other Comprehensive loss, ending balance	(29)	29	(29)	29
Pension Plans [Member]
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive loss, beginning balance			(8,686)	(8,276)
Other Comprehensive Income Before Reclassification Adjustments for Pension and Other Postretirement Benefit Plans			42	(20)
Pension benefit plans, amounts reclassified from accumulated other comprehensive income (loss)			428	292
Accumulated Other Comprehensive loss, ending balance	(8,216)	(8,004)	(8,216)	(8,004)
Other Long-Term Employee Benefit Plans Defined Benefit [Member]
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive loss, beginning balance			202	(274)
Other Comprehensive Income Before Reclassification Adjustments for Pension and Other Postretirement Benefit Plans			30	(1)
Other benefit plans adjustment reclassified from accumulated other comprehensive income (loss)			(143)	(11)
Accumulated Other Comprehensive loss, ending balance	89	(286)	89	(286)
Unrealized Gain (Loss) on Securities
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive loss, beginning balance			2	3
Other Comprehensive Income (Loss), before reclassifications, Unrealized Gain (Loss) on Securities			1	0
Unrealized gain (loss) on securities, amounts reclassified from accumulated other comprehensive income (loss)			(1)	1
Accumulated Other Comprehensive loss, ending balance	$ 2	$ 4	$ 2	$ 4