Income Taxes Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Operating Loss Carryforwards	$ 696	$ 1,002
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals	155	331
Deferred Tax Assets, Tax Credit Carryforwards	11	94
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits	26	29
Deferred Tax Assets, Property, Plant and Equipment	63	0
Deferred Tax Assets, Inventory	67	67
Deferred Tax Assets, Other	264	324
Deferred Tax Assets, Valuation Allowance	(1,166)	(1,702)
Deferred Tax Assets, Net of Valuation Allowance	116	145
Deferred Tax Liabilities, Property, Plant and Equipment	0	(15)
Deferred Tax Liabilities, Goodwill and Intangible Assets	(90)	(57)
Deferred Tax Liabilities, Other	(31)	(52)
Deferred Tax Liabilities, Gross	(121)	(124)
Net Deferred Tax Liability	$ (5)
Deferred Tax Assets, Net		$ 21