Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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

Basis of Presentation and Accounting Policies - Additional Information (Details) € in Millions, $ in Millions	1 Months Ended		3 Months Ended			6 Months Ended
	Apr. 30, 2019 USD ($)	Apr. 30, 2019 EUR (€)	Jun. 30, 2020 USD ($)	Sep. 30, 2019	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Accounting Policies [Line Items]
Net proceeds from sale of tax credits	$ 103.5	€ 92.0
Non-cash impairment charge loss			$ 66.8		$ 64.0	$ 66.8	$ 64.0
Northern Europe \| Germany
Accounting Policies [Line Items]
Non-cash impairment charge loss						$ 66.8
Minimum
Accounting Policies [Line Items]
Percentage of goodwill over fair value of reporting unit				20.00%
Germany
Accounting Policies [Line Items]
Non-cash impairment charge loss			$ 66.8		$ 60.2