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Restructuring Actions (Details) $ in Millions	3 Months Ended					9 Months Ended
Restructuring Actions (Details) $ in Millions	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) position	Jun. 30, 2020 USD ($) position	Sep. 30, 2021 USD ($) position
COVID-19 Pandemic
Restructuring Cost and Reserve
Restructuring and related cost, number of positions affected \| position					400
Restructuring charges					$ 58
Operational/Marketing Capability Restructuring
Restructuring Cost and Reserve
Restructuring charges						$ 107
Restructuring and related cost, expected number of positions affected \| position						3,100
Operational/Marketing Capability Restructuring \| Minimum
Restructuring Cost and Reserve
Expected charges	$ 300					$ 300
Operational/Marketing Capability Restructuring \| Maximum
Restructuring Cost and Reserve
Expected charges	325					325
Operational/Marketing Capability Restructuring \| Employee-Related
Restructuring Cost and Reserve
Restructuring and related cost, number of positions affected \| position				2,100
Restructuring charges	$ 50	$ 43	$ 14	$ 137		107
Operational/Marketing Capability Restructuring \| Cost of sales
Restructuring Cost and Reserve
Restructuring charges						18
Operational/Marketing Capability Restructuring \| Selling, general and administrative expenses
Restructuring Cost and Reserve
Restructuring charges						74
Operational/Marketing Capability Restructuring \| Research, development and related expenses
Restructuring Cost and Reserve
Restructuring charges						15
Corporate and Unallocated \| Operational/Marketing Capability Restructuring \| Employee-Related
Restructuring Cost and Reserve
Restructuring charges						32
Corporate and Unallocated \| Divestiture-Related Restrucutring
Restructuring Cost and Reserve
Restructuring and related cost, number of positions affected \| position					1,300
Restructuring charges					$ 55
Safety and Industrial \| Operational/Marketing Capability Restructuring \| Employee-Related
Restructuring Cost and Reserve
Restructuring charges						28
Transportation and Electronics \| Operational/Marketing Capability Restructuring \| Employee-Related
Restructuring Cost and Reserve
Restructuring charges						23
Health Care \| Operational/Marketing Capability Restructuring \| Employee-Related
Restructuring Cost and Reserve
Restructuring charges						18
Consumer \| Operational/Marketing Capability Restructuring \| Employee-Related
Restructuring Cost and Reserve
Restructuring charges						$ 6