Goodwill and Other Identifiable Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Detail) $ in Millions	3 Months Ended
Mar. 31, 2019 USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 2,072.7
Acquisitions/divestitures	216.5
Foreign currency translation/other	(6.2)
Ending Balance	2,283.0
Aquatic Systems
Goodwill [Roll Forward]
Beginning Balance	965.9
Acquisitions/divestitures	0.0
Foreign currency translation/other	(0.6)
Ending Balance	965.3
Filtration Solutions
Goodwill [Roll Forward]
Beginning Balance	643.5
Acquisitions/divestitures	216.5
Foreign currency translation/other	(4.5)
Ending Balance	855.5
Flow Technologies
Goodwill [Roll Forward]
Beginning Balance	463.3
Acquisitions/divestitures	0.0
Foreign currency translation/other	(1.1)
Ending Balance	$ 462.2

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-Section 45
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Amount of increase (decrease), classified as other, of an asset representing the future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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