Revenue from Contracts with Clients - Contract Fulfillment Costs (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
Dec. 31, 2018	Nov. 19, 2018	Dec. 31, 2019
Revenue, Performance Obligation [Abstract]
Deferred costs, current	$ 0.4		$ 14.9
Amortization of deferred charges	$ 0.1	$ 7.5	$ 0.8

Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer; classified as current.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054

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