Provision for Income Taxes (Schedule of Significant Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Assets
Deferred tax assets, depreciation	$ 0	$ 0
Deferred tax assets, accrued employee benefits	4,529	4,812
Deferred tax assets, other accrued expenses	617	624
Deferred tax assets, inventories	163	89
Deferred tax assets, unrealized exchange gains/losses	0	0
Deferred tax assets,tax loss/tax credit carryforwards/backs	1,808	2,124
Deferred tax assets, investments in subsidiaries and affiliates	126	133
Deferred tax assets, amortization of intangibles	210	187
Deferred tax assets, other	257	215
Valuation Allowance	(1,308)	(1,529)
Deferred tax assets, net of valuation allowance	6,402	6,655
Net deferred tax asset	2,877	3,382
Liabilities [Abstract]
Deferred tax liabilities, depreciation	742	953
Deferred tax liabilities, accrued employee benefits	410	374
Deferred tax liabilities, other accrued expenses	222	61
Deferred tax liabilities, inventories	144	99
Deferred tax liabilities, unrealized exchange gains/losses	346	224
Deferred tax liabilities, tax loss/tax credit carryforwards/backs	0	0
Deferred tax liabilities, investments in subsidiaries and affiliates	230	154
Deferred tax liabilities, amortization of intangibles	1,345	1,331
Deferred tax liabilities, other	86	77
Deferred tax liabilities	$ 3,525	$ 3,273