Business Segments - Schedule of Disaggregation of Net Sales by Segment (Details) - Sales Revenue, Net - Product Concentration Risk	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Sally Beauty Supply
Disaggregation Of Revenue [Line Items]
Percentage of net sales	100.00%	100.00%	100.00%	100.00%
Sally Beauty Supply | Hair color
Disaggregation Of Revenue [Line Items]
Percentage of net sales	38.30%	36.40%	37.70%	36.10%
Sally Beauty Supply | Hair care
Disaggregation Of Revenue [Line Items]
Percentage of net sales	23.50%	22.10%	23.80%	21.60%
Sally Beauty Supply | Styling tools and supplies
Disaggregation Of Revenue [Line Items]
Percentage of net sales	18.80%	21.30%	19.40%	22.40%
Sally Beauty Supply | Nail
Disaggregation Of Revenue [Line Items]
Percentage of net sales	11.30%	10.90%	10.80%	10.80%
Sally Beauty Supply | Skin and cosmetics
Disaggregation Of Revenue [Line Items]
Percentage of net sales	7.60%	8.50%	7.60%	8.40%
Sally Beauty Supply | Other Beauty items
Disaggregation Of Revenue [Line Items]
Percentage of net sales	0.50%	0.80%	0.70%	0.70%
Sally Beauty Supply | Sales channel, directly to consumer | Company-operated stores
Disaggregation Of Revenue [Line Items]
Percentage of net sales	94.00%	94.20%	94.00%	93.70%
Sally Beauty Supply | Sales channel, through intermediary | E-commerce
Disaggregation Of Revenue [Line Items]
Percentage of net sales	6.00%	5.70%	6.00%	6.20%
Sally Beauty Supply | Sales channel, through intermediary | Franchise stores
Disaggregation Of Revenue [Line Items]
Percentage of net sales	0.00%	0.10%	0.00%	0.10%
Beauty Systems Group
Disaggregation Of Revenue [Line Items]
Percentage of net sales	100.00%	100.00%	100.00%	100.00%
Beauty Systems Group | Hair color
Disaggregation Of Revenue [Line Items]
Percentage of net sales	42.30%	44.30%	42.40%	42.40%
Beauty Systems Group | Hair care
Disaggregation Of Revenue [Line Items]
Percentage of net sales	40.00%	37.20%	39.90%	38.40%
Beauty Systems Group | Styling tools and supplies
Disaggregation Of Revenue [Line Items]
Percentage of net sales	11.40%	11.60%	11.20%	11.70%
Beauty Systems Group | Nail
Disaggregation Of Revenue [Line Items]
Percentage of net sales	2.50%	2.70%	2.30%	2.90%
Beauty Systems Group | Skin and cosmetics
Disaggregation Of Revenue [Line Items]
Percentage of net sales	3.40%	3.70%	3.90%	4.10%
Beauty Systems Group | Other Beauty items
Disaggregation Of Revenue [Line Items]
Percentage of net sales	0.40%	0.50%	0.30%	0.50%
Beauty Systems Group | Sales channel, directly to consumer | Company-operated stores
Disaggregation Of Revenue [Line Items]
Percentage of net sales	66.60%	69.20%	66.90%	69.70%
Beauty Systems Group | Sales channel, through intermediary | Distributor sales consultants
Disaggregation Of Revenue [Line Items]
Percentage of net sales	13.90%	14.10%	13.90%	14.00%
Beauty Systems Group | Sales channel, through intermediary | E-commerce
Disaggregation Of Revenue [Line Items]
Percentage of net sales	11.60%	8.80%	11.80%	8.80%
Beauty Systems Group | Sales channel, through intermediary | Franchise stores
Disaggregation Of Revenue [Line Items]
Percentage of net sales	7.90%	7.90%	7.40%	7.50%