Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions		3 Months Ended		6 Months Ended
		Feb. 29, 2024	Feb. 28, 2023	Feb. 29, 2024	Feb. 28, 2023
Revenue
Revenue		$ 862.7	$ 1,122.0	$ 1,671.5	$ 1,888.5
Cost of revenue
Cost of revenue		740.5	1,005.2	1,428.0	1,702.2
Margin		122.2	116.8	243.5	186.3
Selling and administrative expense		63.6	59.0	119.9	112.4
Net gain on disposition of equipment		(4.9)	(9.6)	(4.8)	(12.9)
Impairment of long-lived assets					24.2
Earnings from operations		63.5	67.4	128.4	62.6
Other costs
Interest and foreign exchange		24.6	21.6	47.8	41.2
Earnings before income tax and earnings from unconsolidated affiliates		38.9	45.8	80.6	21.4
Income tax expense		(9.3)	(11.9)	(19.3)	(8.1)
Earnings before earnings from unconsolidated affiliates		29.6	33.9	61.3	13.3
Earnings from unconsolidated affiliates		4.0	2.9	5.5	6.2
Net earnings		33.6	36.8	66.8	19.5
Net earnings attributable to noncontrolling interest		(0.2)	(3.7)	(2.2)	(3.1)
Net earnings attributable to Greenbrier		$ 33.4	$ 33.1	$ 64.6	$ 16.4
Basic earnings per common share		$ 1.08	$ 1.01	$ 2.08	$ 0.5
Diluted earnings per common share	[1]	$ 1.03	$ 0.97	$ 1.99	$ 0.49
Weighted average common shares:
Basic		31,117	32,588	31,071	32,654
Diluted		32,570	34,400	32,676	33,654
Manufacturing
Revenue
Revenue		$ 735.8	$ 968.6	$ 1,411.7	$ 1,615.1
Cost of revenue
Cost of revenue		656.2	901.2	1,257.1	1,505.7
Maintenance Services
Revenue
Revenue		75.2	98.0	159.0	183.5
Cost of revenue
Cost of revenue		69.2	89.6	140.8	169.2
Leasing & Management Services
Revenue
Revenue		51.7	55.4	100.8	89.9
Cost of revenue
Cost of revenue		$ 15.1	$ 14.4	$ 30.1	$ 27.3

[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