Provision for Income Taxes (Schedule of Significant Components of Deferred Tax Assets and Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Asset
Deferred tax assets, depreciation	$ 0	$ 0
Deferred tax asset, accrued employee benefits	3,754	5,198
Deferred tax asset, other accrued expenses	818	723
Deferred tax asset, inventories	275	231
Deferred tax asset, unrealized exchange gains/losses	65	0
Deferred tax asset, tax loss tax credit carryforwards and backs	2,615	2,733
Deferred tax asset, investment in subsidiaries and affiliates	189	78
Deferred tax asset, amortization of intangibles	109	58
Deferred tax asset, other	316	244
Valuation allowance	(1,764)	(1,914)
Deferred tax asset	6,377	7,351
Net deferred tax asset	2,144	3,589
Liability
Deferred tax liability, depreciation	1,707	1,696
Deferred tax liability, accrued employee benefits	512	167
Deferred tax liability, other accrued expenses	87	65
Deferred tax liability, inventories	151	105
Deferred tax liability, unrealized exchange gains/losses	0	37
Deferred tax liability, tax loss tax credit carryforwards and backs	0	0
Deferred tax liability, investment in subsidiaries and affiliates	245	92
Deferred tax liability, amortization of intangibles	1,372	1,335
Deferred tax liability, other	159	265
Deferred tax liability	$ 4,233	$ 3,762