Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Nov. 30, 2025

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following tables summarize the activity in Accumulated other comprehensive income (loss), net of tax, by component, for the periods indicated:

	Three months ended November 30, 2025
	Foreign currency translation adjustments		Retirement benefit plans		Total
Beginning balance at September 1, 2025	$	(32.5)	$	(5.2)	$	(37.7)
Other comprehensive income (loss) before reclassifications		(3.8)		—		(3.8)
Less amount reclassified from Accumulated other comprehensive income (loss):
Amortization of net actuarial (gain) loss (net of tax of $0.0)		—		0.4		0.4
Amortization of prior service (credit) cost (net of tax of $0.0)		—		(0.2)		(0.2)
Other comprehensive income (loss)		(3.8)		0.2		(3.6)
Ending balance at November 30, 2025	$	(36.3)	$	(5.0)	$	(41.3)
	Three months ended November 30, 2024
	Foreign currency translation adjustments		Retirement benefit plans		Total
Beginning balance at September 1, 2024	$	(38.7)	$	(5.4)	$	(44.1)
Other comprehensive income (loss) before reclassifications		(11.9)		—		(11.9)
Less amount reclassified from Accumulated other comprehensive income (loss):
Amortization of net actuarial (gain) loss (net of tax of $0.0)		—		0.4		0.4
Amortization of prior service (credit) cost (net of tax of $0.0)		—		(0.2)		(0.2)
Other comprehensive income (loss)		(11.9)		0.2		(11.7)
Ending balance at November 30, 2024	$	(50.6)	$	(5.2)	$	(55.8)
	Six months ended November 30, 2025
	Foreign currency translation adjustments		Retirement benefit plans		Total
Beginning balance at June 1, 2025	$	(36.0)	$	(5.5)	$	(41.5)
Other comprehensive income (loss) before reclassifications		(0.3)		—		(0.3)
Less: amount reclassified from Accumulated other comprehensive income (loss)
Amortization of net actuarial (gain) loss (net of tax of $0.0)		—		0.8		0.8
Amortization of prior service (credit) cost (net of tax of $0.1)		—		(0.3)		(0.3)
Other comprehensive income (loss)		(0.3)		0.5		0.2
Ending balance at November 30, 2025	$	(36.3)	$	(5.0)	$	(41.3)
	Six months ended November 30, 2024
	Foreign currency translation adjustments		Retirement benefit plans		Total
Beginning balance at June 1, 2024	$	(46.9)	$	(5.6)	$	(52.5)
Other comprehensive income (loss) before reclassifications		(3.7)		—		(3.7)
Less: amount reclassified from Accumulated other comprehensive income (loss)
Amortization of net actuarial (gain) loss (net of tax of $0.0)		—		0.7		0.7
Amortization of prior service (credit) cost (net of tax of $0.1)		—		(0.3)		(0.3)
Other comprehensive income (loss)		(3.7)		0.4		(3.3)
Ending balance at November 30, 2024	$	(50.6)	$	(5.2)	$	(55.8)

Reclassification out of Accumulated Other Comprehensive Income

The following table presents the impact on earnings of reclassifications out of Accumulated other comprehensive income (loss) for the periods indicated:

	Three months ended				Six months ended				Condensed Consolidated Statements of Operations line item
	November 30,		November 30,		November 30,		November 30,
	2025		2024		2025		2024
Employee benefit plans:
Amortization of net actuarial loss	$	0.4	$	0.4	$	0.8	$	0.7	Other components of net periodic benefit (cost)
Amortization of prior service (credit) loss		(0.2)		(0.2)		(0.4)		(0.4)	Other components of net periodic benefit (cost)
Less: Tax effect		0.0		0.0		0.1		0.1	Provision (benefit) for income taxes
Total cost, net of tax	$	0.2	$	0.2	$	0.5	$	0.4