Goodwill and Intangible Assets - Goodwill Rollforward (Details) $ in Millions	9 Months Ended
Oct. 31, 2021 USD ($)
Goodwill changes:
Goodwill, beginning balance	$ 1,452.7
Goodwill acquired during the year	62.9
Goodwill adjusted during the year	(0.2)
Goodwill, ending balance	$ 1,515.4

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.

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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- Definition

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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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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