Income Taxes, Federal and State NOL Carryforwards (Details) $ in Millions	12 Months Ended
Dec. 31, 2019 USD ($)
Federal [Member]
NOL Carryforwards [Abstract]
Operating loss carryforwards, amount	$ 114
Tax year expiring	2026
State [Member]
NOL Carryforwards [Abstract]
Operating loss carryforwards, amount	$ 89
Tax year expiring	2031

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319

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