Provision for Income Taxes (Schedule of Significant Components of Deferred Tax Assets and Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Asset
Deferred tax asset, accrued employee benefits	$ 5,562	$ 3,731
Deferred tax asset, other accrued expenses	1,020	928
Deferred tax asset, inventories	199	273
Deferred tax asset, unrealized exchange gains/losses	0	34
Deferred tax asset, tax loss/tax credit carryforwards/backs	2,854	2,680
Deferred tax asset, investment in subsidiaries and affiliates	46	41
Deferred tax asset, amortization of intangibles	69	53
Deferred tax asset, other	250	314
Valuation allowance	(1,971)	(1,666)
Deferred tax asset	8,029	6,388
Net deferred tax asset	3,631	3,111
Liability
Deferred tax liability, depreciation	1,781	1,614
Deferred tax liability, accrued employee benefits	252	81
Deferred tax liability, other accrued expenses	354	369
Deferred tax liability, inventories	39	154
Deferred tax liability, unrealized exchange gains/losses	35	0
Deferred tax liability, investment in subsidiaries and affiliates	259	279
Deferred tax liability, amortization of intangibles	1,399	636
Deferred tax liability, other	279	144
Deferred tax liability	$ 4,398	$ 3,277