Acquisitions and Divestitures - Divestitures (Details) - USD ($) $ in Millions	1 Months Ended			6 Months Ended
	Jun. 30, 2018	May 31, 2018	Feb. 28, 2018	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Divestiture Information
Aggregate operating income of divested businesses				$ 25	$ 10
Disposal Group, Held-for-sale, Not Discontinued Operations
Divestiture Information
Disposal - Accounts receivable						$ 25
Disposal - Property, plant and equipment						20
Disposal - Goodwill						$ 275
Communication Markets Division | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Divestiture Information
Annual sales of divested business	$ 400
Proceeds from divested businesses	772
Estimated pre-tax gain on sale	$ 494
Communication Markets Division | Disposal Group, Held-for-sale, Not Discontinued Operations
Divestiture Information
Proceeds from divested businesses				$ 30
Personal Safety Product Offerings | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Divestiture Information
Annual sales of divested business			$ 15
Personal Safety Product Offerings | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Maximum
Divestiture Information
Pre-tax gain on sale			$ 20
Abrasives glass products business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Divestiture Information
Annual sales of divested business		$ 10
Abrasives glass products business | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Maximum
Divestiture Information
Pre-tax gain on sale		$ 15