Subsequent Events- Schedule of Carrying Amounts (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
CURRENT ASSETS
Non-utility property, net accumulated depreciation	$ 4,128	$ 4,194
Clean Energy Businesses | Disposal Group, Held-for-sale, Not Discontinued Operations
CURRENT ASSETS
Cash and temporary cash investments	18
Accounts receivable and other receivables - net allowance for uncollectible accounts	204
Accrued unbilled revenue	120
Fuel oil, gas in storage, materials and supplies, at average cost	40
Restricted cash	163
Fair value of derivatives assets	58
Other current assets	173
TOTAL CURRENT ASSETS	776
Non-utility property, net accumulated depreciation	4,114
Construction work in progress	385
NET PLANT	4,499
OTHER NONCURRENT ASSETS
Goodwill	31
Intangible assets, less accumulated amortization	1,222
Operating lease right-of-use asset	266
Fair value of derivatives assets	104
Other deferred charges and noncurrent assets	22
TOTAL OTHER NONCURRENT ASSETS	1,645
TOTAL ASSETS	6,920
CURRENT LIABILITIES
Long-term debt due within one year	323
Term loan	150
Accounts payable	217
Operating lease liabilities	32
Other current liabilities	143
TOTAL CURRENT LIABILITIES	865
NONCURRENT LIABILITIES
Asset retirement obligations	76
Operating lease liabilities	248
Other deferred credits and noncurrent liabilities	20
TOTAL NONCURRENT LIABILITIES	344
LONG-TERM DEBT	2,344
TOTAL LIABILITIES	$ 3,553