Restatement of Previously Issued Condensed Consolidated Financial Statements Schedule of Restatement of Consolidated Statement of Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 28, 2019	Sep. 29, 2018
Statements of Comprehensive Income
Net income/(loss)	$ 898			$ 618			$ 1,750	$ 2,374
Foreign currency translation adjustments	(407)			(144)			(257)	(809)
Net deferred gains/(losses) on net investment hedges	151			13			147	158
Amounts excluded from the effectiveness assessment of net investment hedges	6			3			16	3
Net deferred losses/(gains) on net investment hedges reclassified to net income/(loss)	(6)			(2)			(10)	(2)
Net deferred gains/(losses) on cash flow hedges	50			(16)			24	40
Net deferred losses/(gains) on cash flow hedges reclassified to net income/(loss)	(50)			12			(55)	(10)
Net actuarial gains/(losses) arising during the period	(9)			17			(14)	70
Net postemployment benefit losses/(gains) reclassified to net income/(loss)	(59)			(58)			(176)	(133)
Total other comprehensive income/(loss)	(316)	$ (123)	$ 135	(175)	$ (582)	$ 74	(304)	(683)
Total comprehensive income/(loss)	582			443			1,446	1,691
Comprehensive income/(loss) attributable to noncontrolling interest	2			(3)			12	(15)
Comprehensive income/(loss) attributable to common shareholders	$ 580			446			$ 1,434	1,706
As Previously Reported
Statements of Comprehensive Income
Net income/(loss)				628				2,376
Foreign currency translation adjustments				(146)				(817)
Net deferred gains/(losses) on net investment hedges				13				158
Amounts excluded from the effectiveness assessment of net investment hedges				3				3
Net deferred losses/(gains) on net investment hedges reclassified to net income/(loss)				(2)				2
Net deferred gains/(losses) on cash flow hedges				(16)				40
Net deferred losses/(gains) on cash flow hedges reclassified to net income/(loss)				12				(10)
Net actuarial gains/(losses) arising during the period				17				70
Net postemployment benefit losses/(gains) reclassified to net income/(loss)				(58)				(133)
Total other comprehensive income/(loss)				(177)	(588)	$ 74		(691)
Total comprehensive income/(loss)				451				1,685
Comprehensive income/(loss) attributable to noncontrolling interest				(4)				(16)
Comprehensive income/(loss) attributable to common shareholders				455				1,701
Restatement | Restatement Impacts
Statements of Comprehensive Income
Net income/(loss)				(10)				(2)
Foreign currency translation adjustments				2				8
Net deferred gains/(losses) on net investment hedges				0				0
Amounts excluded from the effectiveness assessment of net investment hedges				0				0
Net deferred losses/(gains) on net investment hedges reclassified to net income/(loss)				0				0
Net deferred gains/(losses) on cash flow hedges				0				0
Net deferred losses/(gains) on cash flow hedges reclassified to net income/(loss)				0				0
Net actuarial gains/(losses) arising during the period				0				0
Net postemployment benefit losses/(gains) reclassified to net income/(loss)				0				0
Total other comprehensive income/(loss)				2	$ 6			8
Total comprehensive income/(loss)				(8)				6
Comprehensive income/(loss) attributable to noncontrolling interest				1				1
Comprehensive income/(loss) attributable to common shareholders				$ (9)				$ 5