Accounting Policies - Equity Based Compensation (Details)	12 Months Ended
Dec. 31, 2020
Minimum
Accounting Policies [Abstract]
Award vesting period	1 year
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Award vesting period	1 year
Maximum
Accounting Policies [Abstract]
Award vesting period	5 years
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Award vesting period	5 years

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration