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Basis of Presentation and Accounting Policies - Additional Information (Details) € in Millions, $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Apr. 30, 2019 USD ($) | Apr. 30, 2019 EUR (€) | Apr. 30, 2018 USD ($) | Apr. 30, 2018 EUR (€) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Sep. 30, 2019 USD ($)
Subsequent Event [Line Items] |  |  |  |  |  |  |
Net proceeds from sale of tax credits | $ 103.5 | € 92.0 | $ 234.5 | € 190.9 |  |  |
Non-cash goodwill impairment charge |  |  |  |  | $ 0.0 |  | $ 64.0
Impairment of indefinite-lived intangible assets |  |  |  |  | $ 0.0 |  |
Northern Europe | Germany |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Non-cash goodwill impairment charge |  |  |  |  |  | $ 60.2 |
APME | New Zealand |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Non-cash goodwill impairment charge |  |  |  |  |  | $ 3.8 |
Goodwill | Measurement Input Discount Rate | Minimum |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Discount rate for goodwill impairment test (as a percent) |  |  |  |  | 0.099 |  | 0.099
Goodwill | Measurement Input Discount Rate | Maximum |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Discount rate for goodwill impairment test (as a percent) |  |  |  |  | 0.131 |  | 0.131

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