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Revenue Recognition - Schedule of Changes Within Defense Segment Due to Contract Adjustments (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation Of Revenue [Line Items]
Net sales	$ 4.5	$ (0.4)	$ 28.2	$ 55.7
Operating income	1.6	(10.5)	15.2	37.6
Net income	$ 1.2	$ (8.2)	$ 11.6	$ 28.9
Diluted earnings per share	$ 0.02	$ (0.12)	$ 0.17	$ 0.41

X

- Definition

Increase (decrease) in earnings per share due to margin rate adjustments (in dollars per share) for contracts accounted for using the percentage of completion method.

+ References

No definition available.

+ Details

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X

- Definition

Increase (decrease) in net income due to margin rate adjustments for contracts accounted for using the percentage of completion method.

+ References

No definition available.

+ Details

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X

- Definition

Increase (decrease) in net sales due to margin rate adjustments for contracts accounted for using the percentage of completion method.

+ References

No definition available.

+ Details

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- Definition

Increase (decrease) in operating income due to margin rate adjustments for contracts accounted for using the percentage of completion method.

+ References

No definition available.

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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