Stockholders' Equity Stockholders' Equity (Reclassifications out of accumulated other Comprehensive Income / (Loss)) (Details) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Cost of goods sold		$ 4,371	$ 4,242
Income Tax Expense (Benefit)		224	406
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest		1,338	1,229
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax		122	115
Other income net		306	372
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
Income Tax Expense (Benefit)	[1]	3	(4)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax		122	115
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
Cost of goods sold	[2]	(8)	11
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest		(5)	7
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member]
Income Tax Expense (Benefit)	[1]	0	0
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest		(1)	1
Other income net	[3]	(1)	1
Pension Plan [Member] | Prior service (benefit) cost
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[4]	(1)	(2)
Pension Plan [Member] | Actuarial losses
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[4]	190	172
Pension Plan [Member] | Curtailment loss (gain)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[4]	0	49
Pension Plan [Member] | Settlement loss
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[4]	0	1
Pension Plan [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		189	220
Reclassification from AOCI, Current Period, Tax	[1]	(65)	(77)
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax		124	143
Other Post Employment Benefit Plans [Member] | Prior service (benefit) cost
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[4]	(17)	(39)
Other Post Employment Benefit Plans [Member] | Actuarial losses
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[4]	23	17
Other Post Employment Benefit Plans [Member] | Curtailment loss (gain)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[4]	0	(30)
Other Post Employment Benefit Plans [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		6	(52)
Reclassification from AOCI, Current Period, Tax	[1]	(2)	16
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax		$ 4	$ (36)

[1] Provision for income taxes from continuing operations.

[2] Cost of goods sold.

[3] Other income, net.

[4] These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost of the company's pension and other benefit plans. See Note 14 for additional information.