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Revenue Recognition - Schedule of Impact Due to Contract Adjustments (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Disaggregation of Revenue [Abstract] |  |
Net sales | $ (7.6) | $ (10.0)
Operating income | (17.5) | (13.1)
Net income | $ (13.4) | $ (10.0)
Diluted earnings per share | $ (0.21) | $ (0.15)

X
- Definition Increase decrease in diluted earnings per share due to margin rate adjustments in dollar per share. + 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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X
- 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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Namespace Prefix: | osk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
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