Income Tax (Net Operating Loss Carryforward) (Details) $ in Millions	Dec. 31, 2024 USD ($)
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 3,899
No Expiration And No Valuation Allowance [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	2,845
Full Valuation Allowance [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	591
No Expiration And Partial Valuation Allowance [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	463
Expiration Date Of 2034 And No Valuation Allowance
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 0