Financial Instruments - Gross Assets And Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Derivative Asset [Abstract]
Derivative Assets Subject to Master Netting Agreement	$ 21	$ 25
Derivatives Available for Offset	1	1
Non-cash Collateral Received	0	0
Cash Collateral Received	0	0
Net Amount of Derivative Assets	20	24
Derivative Liability [Abstract]
Derivative Liabilities Subject to Master Netting Agreement	(1)	(1)
Derivatives Available for Offset	1	1
Non-cash Collateral Pledged	0	0
Cash Collateral Pledged	0	0
Net Amount of Derivative Liabilities	0	0
JP Morgan Chase Bank
Derivative Asset [Abstract]
Derivative Assets Subject to Master Netting Agreement	21	25
Derivatives Available for Offset	1	1
Non-cash Collateral Received	0	0
Cash Collateral Received	0	0
Net Amount of Derivative Assets	20	24
Derivative Liability [Abstract]
Derivative Liabilities Subject to Master Netting Agreement	(1)	(1)
Derivatives Available for Offset	1	1
Non-cash Collateral Pledged	0	0
Cash Collateral Pledged	0	0
Net Amount of Derivative Liabilities	$ 0	$ 0