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Income Tax (Details 1) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Components of Net Deferred Tax Assets
Postretirement benefits, net	$ 273	$ 327
Intangible assets	(1,523)	(1,674)
Investments in non-US Subsidiaries	(325)	(353)
Other, net	61	115
Deferred Tax Assets, Net, Total	$ (1,514)	$ (1,585)

The tax effect as of the balance sheet date of the amount of estimated future tax deductions arising from postretirement benefits, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.

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