Assets Held For Sale (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 7	$ 1
East River Facility And CanExel [Member] | Disposal Group, Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of Long-Lived Assets Held-for-use	2
Disposal Group, Including Discontinued Operation, Assets	19
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net	2
Disposal Group, Including Discontinued Operation, Inventory, Current	12
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment	5
Disposal Group, Including Discontinued Operation, Liabilities	2
Non-Operating Facility [Member] | Disposal Group, Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Assets	$ 2