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Restructuring - Additional Information (Detail) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) Person | Jun. 30, 2018 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |
Number of employees | Person |  |  | 300 |
Total restructuring costs | $ 6.7 | $ 25.0 | $ 7.8 | $ 30.6
Aquatic Systems |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total restructuring costs | 2.0 | 1.2 | 2.9 | 3.0
Filtration Solutions |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total restructuring costs | 1.2 | 11.5 | 1.6 | 13.5
Flow Technologies |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total restructuring costs | 2.4 | 6.3 | 2.1 | 8.0
Other |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total restructuring costs | $ 1.1 | $ 6.0 | $ 1.2 | $ 6.1

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