Reclassifications out of Accumulated Other Comprehensive Loss Reclassifications out of Accumulated Other Comprehensive Loss (Parenthetical) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income Tax Expense (Benefit)	$ (138)	$ (203)	$ (201)
Net Income (Loss) Attributable to Noncontrolling Interest	(46)	(25)	(74)
Foreign Currency Translation Adjustment | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income Tax Expense (Benefit)	0
Net Income (Loss) Attributable to Noncontrolling Interest	0
Amortization of Prior Service Cost and Unrecognized Gains and Losses | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income Tax Expense (Benefit)	10
Net Income (Loss) Attributable to Noncontrolling Interest	8
Immediate Recognition of Prior Service Cost and Unrecognized Gains and Losses Due to Curtailments, Settlements and Divestitures | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income Tax Expense (Benefit)	1
Net Income (Loss) Attributable to Noncontrolling Interest	0
Deferred Derivative Gains (Losses) | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income Tax Expense (Benefit)	0
Net Income (Loss) Attributable to Noncontrolling Interest	$ 0