Derivative Instruments (Tables)

12 Months Ended

Mar. 31, 2026

Derivative Instrument Detail [Abstract]

Summary of Notional Amount at Inception and Fair Value

The following table summarizes the notional amount at inception and fair value of these instruments:


		2026												2025
		Carrying amount assets				Carrying amount liabilities				Notional amount				Carrying amount assets				Carrying amount liabilities				Notional amount
		(In million)				(In million)				(In million)				(In million)				(In million)				(In million)
Foreign currency swaps		$	14.9			$	3.9			$	2,487.3			$	2.0			$	3.2			$	1,452.2
Foreign currency forwards			2.1				2.0				761.3				1.1				0.6				727.0
Non-deliverable foreign exchange forwards			11.2				12.8				2,168.6				0.1				1.0				123.9

Total derivative instruments			28.2				18.7				5,417.2				3.2				4.8				2,303.1