Contingencies (Shareholder Class Action and Shareholder Derivative Lawsuits) (Details) $ in Millions	1 Months Ended			3 Months Ended				6 Months Ended	7 Months Ended	12 Months Ended
	Jan. 31, 2022 USD ($)	Apr. 30, 2021 claim	Aug. 31, 2020 shareholder	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2019 lawsuit shareholder	Mar. 31, 2021 shareholder	Jan. 31, 2022 contract	Dec. 31, 2021 USD ($)	Aug. 31, 2021 shareholder
Loss Contingencies [Line Items]
Loss contingency, number of shareholders filing class action lawsuits | shareholder							2
Litigation settlement						$ 90
Provision related to litigation recorded										$ 90
Payments for legal settlements	$ 90
Loss contingency, number of shareholders filing derivative lawsuits | shareholder			2					3			6
Loss contingency, number of pending cases consolidated		5							5
Loss Contingency, Number Of Lawsuits Subsequently Consolidated Into A Single Proceeding | lawsuit							2
Federal And State Shareholder Derivative Lawsuits [Member]
Loss Contingencies [Line Items]
Provision related to litigation recorded				$ 20	$ 7