Divestitures and Other Transactions Divestitures and Other Transactions - Food Safety Diagnostic Business (Details) - Predecessor [Member] - Food Safety Diagnostic Business [Member] - USD ($) $ in Millions	3 Months Ended	8 Months Ended
	Mar. 31, 2017	Aug. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain on disposal	$ 162	$ 162
Gain on disposal, net of tax		$ 86