Employee Benefit Plans - Schedule of targeted weighted average asset allocations (Details) - U.K. - Pension Plans	May 31, 2024	May 31, 2023
Defined Benefit Plan, Plan Assets, Allocations [Abstract]
Weighted average asset allocations	100.00%	100.00%
Targeted asset allocation	100.00%
Equity securities
Defined Benefit Plan, Plan Assets, Allocations [Abstract]
Weighted average asset allocations	0.00%	29.60%
Targeted asset allocation	37.00%
Cash and cash equivalents
Defined Benefit Plan, Plan Assets, Allocations [Abstract]
Weighted average asset allocations	4.10%	5.10%
Targeted asset allocation	4.00%
Liability-driven instruments
Defined Benefit Plan, Plan Assets, Allocations [Abstract]
Weighted average asset allocations	43.50%	41.70%
Targeted asset allocation	44.00%
Real estate
Defined Benefit Plan, Plan Assets, Allocations [Abstract]
Weighted average asset allocations	0.00%	6.80%
Targeted asset allocation	0.00%
Other
Defined Benefit Plan, Plan Assets, Allocations [Abstract]
Weighted average asset allocations	15.10%	16.80%
Targeted asset allocation	15.00%
Debt Securities
Defined Benefit Plan, Plan Assets, Allocations [Abstract]
Weighted average asset allocations	37.30%	0.00%