Earnings (Loss) Per Share - Summary of Net Income Per Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Numerator:
Net loss	$ (113,891)	$ (74,553)
Less: Net loss attributable to noncontrolling interests	(86,701)	(91,330)
Net loss (income) attributable to Weber Inc. - basic	(27,190)	16,777
Add: Net income (loss) attributable to dilutive impact of Paired Interests	0	(71,380)
Net loss attributable to Weber Inc. - diluted	$ (27,190)	$ (54,603)
Denominator:
Weighted average Class A Common stock outstanding - basic (in shares)	54,604,105	53,309,932
Add: Class A common stock assumed exchange for Paired Interests (in shares)	0	234,645,219
Weighted average shares of Class A common stock outstanding - diluted (in shares)	54,604,105	287,955,151
Earnings (loss) per Class A common stock - basic (in dollars per share)	$ (0.50)	$ 0.31
Earnings (loss) per Class A common stock - diluted (in dollars per share)	$ (0.50)	$ (0.19)