Financial Instruments Derivative Impact on Statements of Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Total amounts presented in the consolidated statements of income in which the following effects were recorded
Cost of products sold	$ 4,129	$ 4,289	$ 12,401	$ 12,672
Interest expense	398	326	1,035	959
Other expense/(income)	(380)	(71)	(893)	(181)
Cost of products sold
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	(7)	(17)	34	(41)
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	(7)	(17)	34	(41)
Interest expense
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	7	5	18	3
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	7	5	18	3
Other expense/(income)
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	38	(20)	31	(34)
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	38	(20)	31	(34)
Not designated as hedging instrument | Cost of products sold | Foreign exchange contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Not designated as hedging instrument | Cost of products sold | Cross-currency contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Not designated as hedging instrument | Cost of products sold | Commodity contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	(13)	(17)	13	(32)
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	(13)	(17)	13	(32)
Not designated as hedging instrument | Interest expense | Foreign exchange contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Not designated as hedging instrument | Interest expense | Cross-currency contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Not designated as hedging instrument | Interest expense | Commodity contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Not designated as hedging instrument | Other expense/(income) | Foreign exchange contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	(10)	(12)	(16)	(56)
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	(10)	(12)	(16)	(56)
Not designated as hedging instrument | Other expense/(income) | Cross-currency contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	3	2	10	1
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	3	2	10	1
Not designated as hedging instrument | Other expense/(income) | Commodity contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Cash Flow Hedging | Designated as hedging instrument | Cost of products sold | Foreign exchange contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	5	1	22	(8)
Net gain/(loss) on derivatives, excluded component, reclassified to net income	1	(1)	(1)	(1)
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	5	1	22	(8)
Cash Flow Hedging | Designated as hedging instrument | Cost of products sold | Interest rate contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Cash Flow Hedging | Designated as hedging instrument | Cost of products sold | Cross-currency contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Net gain/(loss) on derivatives, excluded component, reclassified to net income	0	0	0	0
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Cash Flow Hedging | Designated as hedging instrument | Interest expense | Foreign exchange contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Net gain/(loss) on derivatives, excluded component, reclassified to net income	0	0	0	0
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Cash Flow Hedging | Designated as hedging instrument | Interest expense | Interest rate contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	(1)	(1)	(3)	(3)
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	(1)	(1)	(3)	(3)
Cash Flow Hedging | Designated as hedging instrument | Interest expense | Cross-currency contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Net gain/(loss) on derivatives, excluded component, reclassified to net income	0	0	0	0
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Cash Flow Hedging | Designated as hedging instrument | Other expense/(income) | Foreign exchange contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	(12)	(22)	19
Net gain/(loss) on derivatives, excluded component, reclassified to net income	0	2	0	2
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	(12)	(22)	19
Cash Flow Hedging | Designated as hedging instrument | Other expense/(income) | Interest rate contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	0	0	0	0
Cash Flow Hedging | Designated as hedging instrument | Other expense/(income) | Cross-currency contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	38	0	44	0
Net gain/(loss) on derivatives, excluded component, reclassified to net income	7	0	21	0
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income	38	0	44	0
Net Investment Hedging | Designated as hedging instrument | Cost of products sold | Foreign exchange contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income			0	0
Net gain/(loss) on derivatives, excluded component, reclassified to net income			0	0
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income			0	0
Net Investment Hedging | Designated as hedging instrument | Cost of products sold | Cross-currency contracts
Derivatives designated as hedging instruments:
Net gain/(loss) on derivatives, excluded component, reclassified to net income	0	0	0	0
Net Investment Hedging | Designated as hedging instrument | Interest expense | Foreign exchange contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income			0	0
Net gain/(loss) on derivatives, excluded component, reclassified to net income			(1)	0
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income			0	0
Net Investment Hedging | Designated as hedging instrument | Interest expense | Cross-currency contracts
Derivatives designated as hedging instruments:
Net gain/(loss) on derivatives, excluded component, reclassified to net income	8	6	22	6
Net Investment Hedging | Designated as hedging instrument | Other expense/(income) | Foreign exchange contracts
Derivatives designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income			(6)	0
Net gain/(loss) on derivatives, excluded component, reclassified to net income			0	0
Derivatives not designated as hedging instruments:
Net gains/(losses) on derivatives, reclassified to net income			(6)	0
Net Investment Hedging | Designated as hedging instrument | Other expense/(income) | Cross-currency contracts
Derivatives designated as hedging instruments:
Net gain/(loss) on derivatives, excluded component, reclassified to net income	$ 0	$ 0	$ 0	$ 0