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Acquisitions, Discontinued Operations and Dispositions - Acquisitions (Details) - Stream Energy Acquisition customer in Thousands, $ in Millions	Aug. 01, 2019 USD ($) customer state
Business Acquisition [Line Items]
States in which entity operates | state	9
Cash paid to acquire business | $	$ 329
Working capital and other adjustment | $	$ 29
Increase in retail portfolio by RCE's acquired | customer	600
Customers acquired | customer	450

X

- Definition

Business Acquisition, Consideration Transferred, Working Capital And Other Adjustments

+ References

No definition available.

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- Definition

Business Acquisition, Customers Acquired

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- Definition

Business Acquisition, Residential Customer Equivalents Acquired

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The number of states the entity operates in as of the balance sheet date.

+ References

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585

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