Derivative Financial instruments and Risk Management-Effect of net settlement provisions upon default or termination (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Assets
Gross Amount of Recognized Assets	$ 462	$ 342
Financial Instruments Not Offset- Assets	(152)	(114)
Cash collateral received	0	0
Net Amount of Assets	310	228
Liabilities
Gross Amount of Recognized Liabilities	(302)	(130)
Financial Instruments Not Offset-Liabilities	152	114
Cash collateral pledged	0	0
Net Amount of Liabilities	$ (150)	$ (16)

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