Variable Interest Entities - Power Purchase Commitment (Details) - Power purchase commitment $ in Millions	Dec. 31, 2022 USD ($)	May 31, 2022 MW
Variable interest entities
Firm capacity from power purchase commitment (in megawatts) \| MW		236.5
Residual guarantee associated with power purchase commitment \| $	$ 0.0

Amount of residual asset covered by residual value guarantee. Excludes guarantee considered to be lease payments for lessor.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 7
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124258985&loc=SL77919381-209981

Name:	us-gaap_ResidualValueOfLeasedAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant