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v3.20.2

Subsequent Events (Details) customer in Millions, $ in Millions | Jul. 24, 2020 USD ($) state customer | Jul. 22, 2020 USD ($) | Jun. 30, 2020 USD ($)
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Leased Assets, Powerton facility and Units 7 and 8 of the Joliet facility |  |  |
Subsequent Event [Line Items] |  |  |
Operating lease liabilities |  |  | $ 148.0
Subsequent Event | Powerton Facility And Units 7 And 8 Of The Joliet Facility |  |  |
Subsequent Event [Line Items] |  |  |
Payment for asset acquisition |  | $ 260.0 |
Subsequent Event | Direct Energy |  |  |
Subsequent Event [Line Items] |  |  |
Customers added (over) | customer | 3 |  |
Cash paid to acquire business | $ 3,600.0 |  |
Proceeds from issuance of long-term debt | 2,400.0 |  |
Proceeds from issuance or sale of equity | 750.0 |  |
Line of Credit Facility, Increase (Decrease), Net | 3,500.0 |  |
Termination fee due from acquiree for failure to obtain shareholder approval | 30.0 |  |
Termination fee if Purchase Agreement terminated | $ 180.0 |  |
Subsequent Event | Direct Energy | U.S. |  |  |
Subsequent Event [Line Items] |  |  |
States in which entity operates | state | 50 |  |
Subsequent Event | Direct Energy | Canada |  |  |
Subsequent Event [Line Items] |  |  |
Provinces in which entity operates | state | 6 |  |

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- Definition Amount of increase (decrease) of the credit facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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