Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions		3 Months Ended		9 Months Ended
		May 31, 2023	May 31, 2022	May 31, 2023	May 31, 2022
Revenue
Revenue		$ 1,038.1	$ 793.5	$ 2,926.6	$ 2,027.0
Cost of revenue
Cost of revenue		910.0	717.2	2,612.2	1,848.3
Margin		128.1	76.3	314.4	178.7
Selling and administrative expense		63.3	57.4	175.7	156.4
Net gain on disposition of equipment		(2.3)	(0.7)	(15.2)	(34.3)
Asset impairment, disposal, and exit costs		16.4		40.6
Earnings from operations		50.7	19.6	113.3	56.6
Other costs
Interest and foreign exchange		22.8	14.9	64.0	39.3
Earnings before income tax and earnings from unconsolidated affiliates		27.9	4.7	49.3	17.3
Income tax expense		(3.6)	(1.1)	(11.7)	(2.9)
Earnings before earnings from unconsolidated affiliates		24.3	3.6	37.6	14.4
Earnings from unconsolidated affiliates		2.4	4.0	8.6	10.0
Net earnings		26.7	7.6	46.2	24.4
Net (earnings) loss attributable to noncontrolling interest		(5.4)	(4.5)	(8.5)	2.3
Net earnings attributable to Greenbrier		$ 21.3	$ 3.1	$ 37.7	$ 26.7
Basic earnings per common share		$ 0.67	$ 0.10	$ 1.17	$ 0.82
Diluted earnings per common share	[1]	$ 0.64	$ 0.09	$ 1.13	$ 0.79
Weighted average common shares:
Basic	[2]	31,757	32,588	32,346	32,560
Diluted		33,571	33,661	33,344	33,626
Manufacturing
Revenue
Revenue		$ 870.2	$ 650.9	$ 2,485.3	$ 1,659.1
Cost of revenue
Cost of revenue		786.5	611.3	2,292.2	1,567.9
Maintenance Services
Revenue
Revenue		122.9	101.5	306.4	260.5
Cost of revenue
Cost of revenue		109.8	91.1	279.0	244.0
Leasing & Management Services
Revenue
Revenue		45.0	41.1	134.9	107.4
Cost of revenue
Cost of revenue		$ 13.7	$ 14.8	$ 41.0	$ 36.4

[1] Diluted earnings per share was calculated as follows: Earnings before interest and debt issuance costs on the 2.875% convertible notes due 2024 Weighted average diluted common shares outstanding

[2] Restricted stock grants and restricted stock units that are considered participating securities, including some grants subject to certain performance criteria, are included in weighted average basic common shares outstanding when the Company is in a net earnings position.