Income Taxes (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)
Change in valuation allowance	$ 71
Unrecognized Tax Benefits	38
Federal
Operating Loss Carryforwards	15
Tax Credit Carryforward, Amount	2
Foreign Tax Authority
Operating Loss Carryforwards	432
State and Local Jurisdiction
Operating Loss Carryforwards	952
Tax Credit Carryforward, Amount	$ 18