Stock-Based Compensation - Schedule of Units Outstanding and Distribution Threshold - Post Modification (Details) - Weber HoldCo LLC Units	6 Months Ended
	Mar. 31, 2022 $ / shares shares
Service-Based Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units outstanding (in shares)	16,060,898
Hybrid Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units outstanding (in shares)	1,677,029
$5.42 – $6.92 | Service-Based Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units outstanding (in shares)	4,142,102
$5.42 – $6.92 | Hybrid Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units outstanding (in shares)	0
$5.42 – $6.92 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distribution threshold (in dollars per share) | $ / shares	$ 5.42
$5.42 – $6.92 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distribution threshold (in dollars per share) | $ / shares	$ 6.92
$6.93 – $8.42 | Service-Based Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units outstanding (in shares)	4,142,102
$6.93 – $8.42 | Hybrid Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units outstanding (in shares)	0
$6.93 – $8.42 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distribution threshold (in dollars per share) | $ / shares	$ 6.93
$6.93 – $8.42 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distribution threshold (in dollars per share) | $ / shares	$ 8.42
$8.43 – $9.42 | Service-Based Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units outstanding (in shares)	5,481,420
$8.43 – $9.42 | Hybrid Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units outstanding (in shares)	1,118,019
$8.43 – $9.42 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distribution threshold (in dollars per share) | $ / shares	$ 8.43
$8.43 – $9.42 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distribution threshold (in dollars per share) | $ / shares	$ 9.42
$9.43 – $10.67 | Service-Based Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units outstanding (in shares)	2,295,274
$9.43 – $10.67 | Hybrid Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units outstanding (in shares)	559,010
$9.43 – $10.67 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distribution threshold (in dollars per share) | $ / shares	$ 9.43
$9.43 – $10.67 | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distribution threshold (in dollars per share) | $ / shares	$ 10.67