Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Change in valuation allowance	$ 43
Research and experimental expenditures	94	$ 0
Unrecognized Tax Benefits	30
Federal
Operating Loss Carryforwards	18
Tax Credit Carryforward, Amount	2
Foreign Tax Authority
Operating Loss Carryforwards	224
Foreign Tax Authority | Hexion
Operating Loss Carryforwards	76
State and Local Jurisdiction
Operating Loss Carryforwards	733
Tax Credit Carryforward, Amount	$ 17