Earnings Per Share (Details) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
Dec. 31, 2019 USD ($) $ / shares shares
Earnings Per Share, Diluted, by Common Class, Including Two Class Method
Weighted-Average Class A Common Shares Outstanding, Basic (in shares)	39.4
Weighted-Average Class A Common Shares Outstanding, Diluted (in shares)	39.4
Common Class A [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method
Net Earnings Available to Class A Common Stockholders \| $	$ 6.0
Weighted-Average Class A Common Shares Outstanding, Basic (in shares)	39.4
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0.0
Weighted-Average Class A Common Shares Outstanding, Diluted (in shares)	39.4
Earnings Per Share, Basic and Diluted \| $ / shares	$ 0.15
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0.1

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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