Operating Revenue Product Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Revenue	$ 14,768	$ 14,314	$ 13,599
Operating segments | Automotive OEM
Disaggregation of Revenue [Line Items]
Revenue	3,338	3,271	2,864
Operating segments | Food Equipment
Disaggregation of Revenue [Line Items]
Revenue	2,214	2,123	2,110
Operating segments | Test & Measurement and Electronics
Disaggregation of Revenue [Line Items]
Revenue	2,171	2,069	1,974
Operating segments | Welding
Disaggregation of Revenue [Line Items]
Revenue	1,691	1,538	1,486
Operating segments | Polymers & Fluids
Disaggregation of Revenue [Line Items]
Revenue	1,724	1,724	1,691
Operating segments | Construction Products
Disaggregation of Revenue [Line Items]
Revenue	1,700	1,672	1,609
Operating segments | Specialty Products
Disaggregation of Revenue [Line Items]
Revenue	1,951	1,938	1,885
Intersegment revenue
Disaggregation of Revenue [Line Items]
Revenue	$ (21)	$ (21)	$ (20)