Business Segments - Business Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Business Segment Information
Net sales	$ 8,829	$ 8,851
Total operating Income	1,641	1,994
Gain/(loss) on sale of businesses	0	0
Total operating expenses	7,188	6,857
Other expense (income), net	38	49
Income before income taxes	1,603	1,945
Operating Segments
Business Segment Information
Total operating Income	1,804	2,041
Operating Segments | Safety and Industrial
Business Segment Information
Net sales	3,051	3,099
Total operating Income	636	752
Operating Segments | Transportation and Electronics
Business Segment Information
Net sales	2,340	2,396
Total operating Income	496	556
Operating Segments | Health Care
Business Segment Information
Net sales	2,124	2,069
Total operating Income	448	464
Operating Segments | Consumer
Business Segment Information
Net sales	1,313	1,289
Total operating Income	224	269
Corporate and Unallocated
Business Segment Information
Net sales	1	(2)
Net costs for significant litigation	(187)	(70)
Gain/(loss) on sale of businesses	0	0
Other corporate expense - net	24	23
Total operating expenses	$ (163)	$ (47)