Reclassifications out of Accumulated Other Comprehensive Loss Reclassifications out of Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Reclassifications out of Accumulated Other Comprehensive Loss [Line Items]
Tax Expense	$ 19	$ 48
Net Income (Loss) Attributable to Minority Shareholders	(2)	12
Reclassification Out of Accumulated Other Comprehensive Income [Member]
Reclassifications out of Accumulated Other Comprehensive Loss [Line Items]
Other Expense and Total Benefit Cost	60
Reclassification Out of Accumulated Other Comprehensive Income [Member] | Foreign Currency Translation Adjustment
Reclassifications out of Accumulated Other Comprehensive Loss [Line Items]
Other Expense, net of tax and minority shareholders' equity	1
Tax Expense	0
Net Income (Loss) Attributable to Minority Shareholders	0
Reclassification Out of Accumulated Other Comprehensive Income [Member] | Unrecognized Net Actuarial Losses and Prior Service Costs
Reclassifications out of Accumulated Other Comprehensive Loss [Line Items]
Total benefit cost, net of tax and minority shareholders' equity	59
Tax Expense	(4)
Net Income (Loss) Attributable to Minority Shareholders	$ (2)