Other Non-current Assets - Investments in Joint Ventures (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended			9 Months Ended		12 Months Ended
	Mar. 31, 2025	Feb. 28, 2026	Feb. 28, 2025	Nov. 30, 2024	Feb. 28, 2026	Feb. 28, 2025	May 31, 2025	Dec. 31, 2025	Aug. 31, 2024
Investments in Joint Ventures
Income (losses) from joint ventures		$ 1.4	$ 0.5		$ 4.3	$ 4.7
Investments in joint ventures		42.6			42.6		$ 32.3
AAR sumisho aviation services
Investments in Joint Ventures
Income (losses) from joint ventures		3.6	2.0		12.0	4.9
Owned Through Joint Ventures | Aircraft
Investments in Joint Ventures
Proceeds from evaluation and inspection services		$ 0.7	$ 0.5		$ 2.8	$ 1.6
Owned Through Joint Ventures | Joint venture in India to operate an airframe maintenance facility
Investments in Joint Ventures
Ownership interest in joint ventures (as a percent)		40.00%			40.00%
Percentage on outstanding debt		40.00%			40.00%
Owned Through Joint Ventures | Joint venture in India
Investments in Joint Ventures
Conditional on the repayment of our loan									$ 0.1
Guarantee liability									$ 9.4
Principal value of our shareholder loan				$ 2.1
Equity method investment, realized gain (loss) on disposal							$ 2.1
Owned Through Joint Ventures | AAR sumisho aviation services
Investments in Joint Ventures
Ownership interest in joint ventures (as a percent)		50.00%			50.00%
Owned Through Joint Ventures | Investment in xCelle Americas, LLC ("xCelle Americas")
Investments in Joint Ventures
Ownership interest in joint ventures (as a percent)		49.90%			49.90%
Loan given with semi-annual principal payments	$ 3.3
Term of the loan (in years)	5 years
Percentage of interest	2.70%
Owned Through Joint Ventures | Joint Venture in XCelle Asia
Investments in Joint Ventures
Ownership interest in joint ventures (as a percent)								49.90%
Investments in joint ventures								$ 7.1