Business Acquisitions and Dispositions - EGTS (Details) - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Nov. 30, 2020	Jul. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Contributions			$ 5	$ 9
Distribution of net assets					$ 699
EGTS | Disposed of by means other than sale
Business Acquisition [Line Items]
Amount of recovery forgone		$ 18
EGTS | Disposed of by means other than sale | Deferred tax liability
Business Acquisition [Line Items]
Contributions		1,000
EGTS | Disposed of by means other than sale | Taxes payable
Business Acquisition [Line Items]
Contributions		34
EGTS | Disposed of by means other than sale | Pension plan asset
Business Acquisition [Line Items]
Distribution of net assets	$ 904	904
EGTS | Disposed of by means other than sale | Other pension related assets
Business Acquisition [Line Items]
Distribution of net assets		$ 107