Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(5))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

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

Commitments and Contingencies - Concentrations of Credit Risk (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 Customer	Dec. 31, 2019 Customer	Dec. 31, 2018 Customer	Jan. 29, 2019 USD ($)
Customer Concentration Risk
Concentration Risk [Line Items]
Number of customers representing ten percent or more of revenue	0	0	0
Number of customers representing ten percent or more of net receivable position	0	0
PG&E \| Pre-Petition Receivables
Concentration Risk [Line Items]
Accounts receivable \| $				$ 165