Summary of Significant Accounting Policies - Credit Losses Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Summary of Significant Accounting Policies [Line Items]
Provision (income) for credit losses	$ 11	$ 698	$ 108
Winter Storm Uri
Summary of Significant Accounting Policies [Line Items]
Provision (income) for credit losses	$ (126)	$ 596