Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions		3 Months Ended		6 Months Ended
		Feb. 28, 2022	Feb. 28, 2021	Feb. 28, 2022	Feb. 28, 2021
Revenue
Revenue		$ 682.8	$ 295.6	$ 1,233.5	$ 698.6
Cost of revenue
Cost of revenue		628.0	278.0	1,131.1	640.3
Margin		54.8	17.6	102.4	58.3
Selling and administrative expense		54.7	43.4	99.0	87.1
Net gain on disposition of equipment		(25.1)	(0.1)	(33.6)	(1.0)
Earnings (loss) from operations		25.2	(25.7)	37.0	(27.8)
Other costs
Interest and foreign exchange		11.8	9.6	24.4	20.7
Earnings (loss) before income tax and earnings (loss) from unconsolidated affiliates		13.4	(35.3)	12.6	(48.5)
Income tax (expense) benefit		(3.2)	21.8	(1.8)	29.1
Earnings (loss) before earnings (loss) from unconsolidated affiliates		10.2	(13.5)	10.8	(19.4)
Earnings (loss) from unconsolidated affiliates		1.0	(0.4)	6.0	(1.2)
Net earnings (loss)		11.2	(13.9)	16.8	(20.6)
Net loss attributable to noncontrolling interest		1.6	4.8	6.8	1.5
Net earnings (loss) attributable to Greenbrier		$ 12.8	$ (9.1)	$ 23.6	$ (19.1)
Basic earnings (loss) per common share		$ 0.39	$ (0.28)	$ 0.72	$ (0.58)
Diluted earnings (loss) per common share		$ 0.38	$ (0.28)	$ 0.70	$ (0.58)
Weighted average common shares:
Basic	[1]	32,582	32,810	32,546	32,766
Diluted		34,463	32,810	33,609	32,766
Manufacturing
Revenue
Revenue		$ 555.7	$ 201.5	$ 1,008.2	$ 506.0
Cost of revenue
Cost of revenue		535.0	201.8	956.6	482.7
Maintenance Services
Revenue
Revenue		86.6	71.6	159.0	137.2
Cost of revenue
Cost of revenue		81.7	66.7	152.9	129.7
Leasing & Management Services
Revenue
Revenue		40.5	22.5	66.3	55.4
Cost of revenue
Cost of revenue		$ 11.3	$ 9.5	$ 21.6	$ 27.9

[1] 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.(2)