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Shareholders' Equity - Share repurchase program (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	7 Months Ended
	Oct. 30, 2021	Oct. 30, 2021	Oct. 30, 2021	Mar. 31, 2021
Equity Class Of Treasury Stock [Line Items]
Shares purchased	807,516	965,029	1,132,978
Stock repurchase cost	$ 34.8	$ 42.4	$ 49.9
Remaining authorized repurchase amount	$ 50.1	$ 50.1	$ 50.1
Maximum
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, Authorized amount				$ 100.0

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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