Financial Instruments Derivative Impact on Statements of Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Derivative [Line Items]
Other comprehensive income (loss), derivatives, gain (loss), before reclassification and tax	$ 314	$ (69)
Cash Flow Hedging | Net sales | Foreign exchange contracts
Derivative [Line Items]
Gains/(losses) recognized in other comprehensive income (loss) on cash flow hedges, before tax	1	(1)
Cash Flow Hedging | Cost of products sold | Foreign exchange contracts
Derivative [Line Items]
Gains/(losses) recognized in other comprehensive income (loss) on cash flow hedges, before tax	72	(19)
Amounts excluded from the effectiveness assessment of cash flow hedges, before tax	(1)	(1)
Cash Flow Hedging | Other expense/(income) | Foreign exchange contracts
Derivative [Line Items]
Gains/(losses) recognized in other comprehensive income (loss) on cash flow hedges, before tax	0	(22)
Cash Flow Hedging | Other expense/(income) | Cross-currency contracts
Derivative [Line Items]
Gains/(losses) recognized in other comprehensive income (loss) on cash flow hedges, before tax	41	24
Amounts excluded from the effectiveness assessment of cash flow hedges, before tax	6	7
Net Investment Hedging | Other expense/(income) | Foreign exchange contracts
Derivative [Line Items]
Gains/(losses) recognized in other comprehensive income (loss) on net investment hedges, before tax	2	9
Net Investment Hedging | Other expense/(income) | Cross-currency contracts
Derivative [Line Items]
Gains/(losses) recognized in other comprehensive income (loss) on net investment hedges, before tax	186	(72)
Net Investment Hedging | Interest expense | Foreign exchange contracts
Derivative [Line Items]
Amounts excluded from the effectiveness assessment of net investment hedges, before tax	(1)	(1)
Net Investment Hedging | Interest expense | Cross-currency contracts
Derivative [Line Items]
Amounts excluded from the effectiveness assessment of net investment hedges, before tax	$ 8	$ 7