Related Party Transactions - Narrative (Details) - DNB Investment - USD ($) $ in Millions	Jul. 06, 2020	Sep. 30, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Payments to acquire interest in affiliate	$ 100.0
Related party receivables		$ 0.1	$ 0.2

For an unclassified balance sheet, amount of receivables arising from transactions with related parties.

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