Amounts Reclassified from Accumulated Other Comprehensive Income/(Losses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income/(Losses) [Line Items]
Other expense/(income)	$ (81)	$ (380)
Interest expense	310	321
Cost of products sold	4,299	3,948
Income/(loss) before income taxes	541	621
Provision for/(benefit from) income taxes	160	217
Net income/(loss)	381	404
Reclassification out of Accumulated Other Comprehensive Income | Net investment hedge adjustments | Foreign exchange contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income/(Losses) [Line Items]
Other expense/(income)	0	6
Interest expense	0	1
Reclassification out of Accumulated Other Comprehensive Income | Net investment hedge adjustments | Cross-currency contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income/(Losses) [Line Items]
Interest expense	(8)	(7)
Reclassification out of Accumulated Other Comprehensive Income | Net cash flow hedge adjustments | Foreign exchange contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income/(Losses) [Line Items]
Other expense/(income)	0	22
Cost of products sold	(1)	(8)
Reclassification out of Accumulated Other Comprehensive Income | Net cash flow hedge adjustments | Cross-currency contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income/(Losses) [Line Items]
Other expense/(income)	(10)	(27)
Reclassification out of Accumulated Other Comprehensive Income | Net cash flow hedge adjustments | Interest rate contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income/(Losses) [Line Items]
Interest expense	1	1
Reclassification out of Accumulated Other Comprehensive Income | Hedge adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income/(Losses) [Line Items]
Income/(loss) before income taxes	18	12
Provision for/(benefit from) income taxes	2	6
Net income/(loss)	16	6
Reclassification out of Accumulated Other Comprehensive Income | Net postemployment benefit plan adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income/(Losses) [Line Items]
Income/(loss) before income taxes	34	78
Provision for/(benefit from) income taxes	9	20
Net income/(loss)	25	58
Reclassification out of Accumulated Other Comprehensive Income | Amortization of unrecognized losses/(gains)
Reclassification Adjustment out of Accumulated Other Comprehensive Income/(Losses) [Line Items]
Other expense/(income)	(3)	(2)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of prior service costs/(credits)
Reclassification Adjustment out of Accumulated Other Comprehensive Income/(Losses) [Line Items]
Other expense/(income)	(31)	(77)
Reclassification out of Accumulated Other Comprehensive Income | Other losses/(gains) on postemployment benefits
Reclassification Adjustment out of Accumulated Other Comprehensive Income/(Losses) [Line Items]
Other expense/(income)	$ 0	$ 1