Segment and Related Information (Details Textuals) customer in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) customer	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting [Abstract]
Number of electric utility customers | customer	2.3
Number of gas utility customers | customer	1.3
Segment Reporting Information [Line Items]
Operating Revenues — Non-utility operations	$ 7,676	$ 4,578	$ 5,530
Continuing operations
Segment Reporting Information [Line Items]
Operating Revenues — Non-utility operations	7,676	4,578	5,530
Reclassifications and Eliminations | Continuing operations
Segment Reporting Information [Line Items]
Operating Revenues — Non-utility operations	(651)	(525)	(647)
Reclassifications and Eliminations | Gas Storage and Pipelines | Continuing operations
Segment Reporting Information [Line Items]
Operating Revenues — Non-utility operations	$ 14	$ 26	$ 27