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Acquisitions and Divestitures - Divestitures (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended		12 Months Ended
	Jan. 31, 2020	Dec. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Divestiture Information
Proceeds from sale of businesses			$ 86	$ 6
Disposal Group, Held-for-sale, Not Discontinued Operations
Divestiture Information
Disposal - Inventory		$ 70	60		$ 70
Disposal - Property, plant and equipment		150	135		150
Disposal - Intangible assets		35			35
Disposal - Goodwill		30	20		$ 30
Aggregate operating income of divested businesses			$ 25
Drug delivery business \| Disposal Group, Held-for-sale, Not Discontinued Operations
Divestiture Information
Annual sales of divested business		380
Proceeds from sale of businesses		650
Pre-tax gain on sale		$ 380
Noncontrolling interest in new company (as a percent)		17.00%			17.00%
Advanced ballistic protection business \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Divestiture Information
Annual sales of divested business					$ 85
Proceeds from sale of businesses	$ 86
Maximum contingent considerations depending on outcome of pending tenders	$ 25