Severance, Exit Costs and Asset Impairments (Schedule of Severance and Exit Costs) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Exit Cost, Net Expense (Benefit)	$ 0	$ 25	$ 38
Severance Cost, Net Expense (Benefit)	(28)	17	(362)
Total severance and exit costs, Net Expense (Benefit)	28	8	400
Exit costs, Cash Payments and Other	(29)	(27)	(62)
Severance cost, Cash Payments and Other	(14)	(86)	(342)
Total severance and exit costs, Cash Payments and Other	(43)	(113)	(404)
Exit Cost	58	87	89	113
Severance Cost	21	7	110	90
Total severance and exit costs liability	$ 79	$ 94	$ 199	$ 203