Stockholders' Equity Stockholders' Equity (Reclassifications out of accumulated other Comprehensive Income / (Loss)) (Details) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Cost of goods sold		$ 4,192	$ 3,990	$ 8,563	$ 8,232
Income Tax Expense (Benefit)		128	306	352	712
Other (Loss) Income, Net		(21)	51	285	423
Income from continuing operations after income taxes		859	1,027	2,197	2,256
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax				237	284
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
Income Tax Expense (Benefit)	[1]	5	(3)	8	(7)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax		115	169	237	284
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]	(13)	7	(21)	18
Income from continuing operations after income taxes		(8)	4	(13)	11
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	0	0
Other (Loss) Income, Net	[3]	0	12	(1)	13
Income from continuing operations after income taxes		0	12	(1)	13
Pension Plan [Member] | Prior service benefit
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[4]	(1)	(1)	(2)	(3)
Pension Plan [Member] | Actuarial losses
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[4]	189	204	379	376
Pension Plan [Member] | Curtailment loss (gain)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[4]	0	17	0	66
Pension Plan [Member] | Settlement loss
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[4]	0	37	0	38
Pension Plan [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		188	257	377	477
Reclassification from AOCI, Current Period, Tax	[1]	(68)	(91)	(133)	(168)
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax		120	166	244	309
Other Post Employment Benefit Plans [Member] | Prior service benefit
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[4]	(18)	(36)	(35)	(75)
Other Post Employment Benefit Plans [Member] | Actuarial losses
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[4]	23	18	46	35
Other Post Employment Benefit Plans [Member] | Curtailment loss (gain)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[4]	0	(3)	0	(33)
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		5	(21)	11	(73)
Reclassification from AOCI, Current Period, Tax	[1]	(2)	8	(4)	24
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax		$ 3	$ (13)	$ 7	$ (49)

[1] Provision for income taxes from continuing operations.

[2] Cost of goods sold.

[3] Other (loss) 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.