Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Statement of Comprehensive Income [Abstract]
Net income/(loss)	$ 898	$ 618	$ 1,750	$ 2,374
Other comprehensive income/(loss), net of tax:
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
Amounts excluded from the effectiveness assessment of cash flow hedges	8	0	21	0
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)	(175)	(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