The value (monetary amount) of the award the plaintiff seeks in the legal matter.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

Name:	us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Commitments and Contingencies (Narrative) (Details)	12 Months Ended
Commitments and Contingencies (Narrative) (Details)	Dec. 31, 2020 USD ($)	Jul. 22, 2020 legalMatter	Aug. 15, 2017 plaintiff
New York Action [Member]
Loss Contingencies [Line Items]
Number of plaintiffs \| plaintiff			2
California Action [Member]
Loss Contingencies [Line Items]
Number Of Legal Matters \| legalMatter		7
Threatened Litigation [Member]
Loss Contingencies [Line Items]
Claims for damages	$ 20,000,000
Pending Litigation [Member]
Loss Contingencies [Line Items]
Claims for damages	$ 280,000,000