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Financing Arrangements (Details) - USD ($) $ in Millions	Mar. 01, 2024	Dec. 14, 2022	Feb. 28, 2025	May 31, 2024
Financing Arrangements
Debt issuance costs, net			$ (9.7)	$ (11.6)
Long-term debt			1,022.3
Senior Notes
Financing Arrangements
Amended Revolving Credit Facility with interest payable monthly			550.0	550.0
Aggregate principal amount	$ 550.0
Interest rate (as a percent)	6.75%
Redemption Period One \| Senior Notes
Financing Arrangements
Debt Instrument, Redemption Price, Percentage	100.00%
Redemption Period Two \| Senior Notes
Financing Arrangements
Debt Instrument, Redemption Price, Percentage	106.75%
Percentage of principal amount redeemed	40.00%
2026
Financing Arrangements
Debt Instrument, Redemption Price, Percentage	103.375%
2027
Financing Arrangements
Debt Instrument, Redemption Price, Percentage	101.688%
2028 and thereafter
Financing Arrangements
Debt Instrument, Redemption Price, Percentage	100.00%
Revolving credit facility with interest payable monthly
Financing Arrangements
Amended Revolving Credit Facility with interest payable monthly			482.0	$ 447.0
Revolving Credit Facility
Financing Arrangements
Maximum borrowing capacity	$ 825.0	$ 620.0
Revolving Credit Facility \| Minimum
Financing Arrangements
Adjusted total debt to EBITDA ratio	3.75
Revolving Credit Facility \| Revolving credit facility with interest payable monthly
Financing Arrangements
Amended Revolving Credit Facility with interest payable monthly			482.0
Line of credit facility, Additional borrowing capacity		300.0
Line of credit facility, Maximum additional borrowing capacity		$ 1,125.0
Remaining borrowing capacity			335.2
Revolving Credit Facility \| Revolving credit facility with interest payable monthly \| Letter of Credit
Financing Arrangements
Income tax refunds received			$ 7.8
Revolving Credit Facility \| Eurodollar rate \| Revolving credit facility with interest payable monthly \| Minimum
Financing Arrangements
Debt instrument basis spread on variable rate after amendment		1.125%
Revolving Credit Facility \| Eurodollar rate \| Revolving credit facility with interest payable monthly \| Maximum
Financing Arrangements
Debt instrument basis spread on variable rate after amendment		2.50%
Revolving Credit Facility \| Base rate
Financing Arrangements
Increase in basis spread on variable rate	1.50%
Revolving Credit Facility \| Base rate \| Revolving credit facility with interest payable monthly \| Minimum
Financing Arrangements
Debt instrument basis spread on variable rate after amendment		0.125%
Revolving Credit Facility \| Base rate \| Revolving credit facility with interest payable monthly \| Maximum
Financing Arrangements
Debt instrument basis spread on variable rate after amendment		1.50%
Revolving Credit Facility \| SOFR
Financing Arrangements
Increase in basis spread on variable rate	2.50%
Revolving Credit Facility \| SOFR \| Revolving credit facility with interest payable monthly
Financing Arrangements
Debt instrument basis spread on variable rate after amendment		0.10%