Contingencies And Commitments (Finance Lease Expense) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Contingencies and Commitments [Abstract]
Amortization of ROU assets	$ 18	[1]
Interest on lease liabilities	3	[2]
Total	$ 21

[1] Amortization of ROU assets is reported in commissions and other expenses on our Consolidated Statements of Comprehensive Income (Loss).

[2] Interest on lease liabilities is reported in interest and debt expense on our Consolidated Statements of Comprehensive Income (Loss).