Supplemental Comprehensive Income (Loss) Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Cumulative translation adjustments, before reclassification, due to Venezuela deconsolidation, pre tax	$ (97)	$ (721)	$ (663)
Cumulative translation adjustments, before reclassification due to Venezuela deconsolidation, net of tax	(125)	(745)	(681)
Reclassification due to Venezuela deconsolidation - cumulative translation adjustment, before-tax	0	(111)	0
Reclassification for Venezuela deconsolidation - cumulative translation adjustment, net-of-tax	0	111	0
Cumulative translation adjustments, before-tax	(97)	(610)	(663)
Cumulative translation adjustment, net-of-tax	(125)	(634)	(681)
Pension and other benefits:
Net actuarial gain (loss) & prior service costs arising during the period, before-tax	(231)	182	(580)
Net actuarial gain (loss) & prior service costs arising during the period, net-of-tax	(152)	115	(374)
Amortization of net actuarial loss, transition & prior service costs, before-tax	63	82	67
Amortization of net actuarial loss, transition & prior service costs, net-of-tax	43	52	45
Reclassification due to Venezuela deconsolidation - pension and other retiree benefits, before tax	0	44	0
Reclassification due to Venezuela deconsolidation - pension and other retiree benefits, net-of-tax	0	29	0
Retirement Plan and other retiree benefit adjustments, before-tax	(168)	308	(513)
Retirement Plan and other retiree benefit adjustments, net-of-tax	(109)	196	(329)
Available-for-sale securities:
Unrealized gains (losses) on available-for-sale securities, before-tax	0	(18)	(341)
Unrealized gains (losses) on available-for-sale securities, net-of-tax	0	(12)	(222)
Reclassification of (gains) losses into net earnings on available-for-sale securities, before-tax	(1)	14	267
Reclassification of (gains) losses into net earnings on available-for-sale securities, net-of-tax	(1)	11	174
Reclassification due to Venezuela deconsolidation - available-for-sale securities, before-tax	0	(10)	0
Reclassification due to Venezuela deconsolidation - available-for-sale securities, net-of-tax	0	(6)	0
Gains (losses) on available-for-sale securities, before-tax	(1)	(14)	(74)
Gains (losses) on available-for-sale securities, net-of-tax	(1)	(7)	(48)
Cash flow hedges:
Unrealized gains (losses) on cash flow hedges, before-tax	11	18	9
Unrealized gains (losses) on cash flow hedges, net-of-tax	8	12	6
Reclassification of (gains) losses into net earnings on cash flow hedges, before-tax	(4)	(16)	(5)
Reclassification of (gains) losses into net earnings on cash flow hedges, net of tax	(3)	(10)	(4)
Gains (losses) on cash flow hedges, before-tax	7	2	4
Gains (losses) on cash flow hedges, net-of-tax	5	2	2
Total Other comprehensive income (loss), before-tax	(259)	(314)	(1,246)
Total Other comprehensive income (loss), net-of-tax	$ (230)	(443)	(1,056)
Remeasurement Due To Change in Foreign Exchange Rates [Abstract]
Loss (gain) related to the remeasurement of fixed interest rate and devaluation-protected bonds in Venezuela		$ 50	$ 324