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Pension Benefit Obligations - Multiemployer (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Pension Benefit Obligations
Aggregate contributions to plans	$ 3.7	$ 4.0

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- References

No definition available.

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- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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