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Segment Information - Schedule of Segment Information (Detail) - USD ($)
$ in Millions
 3 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]    
Revenues $ 1,335 $ 1,256
Operating income (loss) 196 165
Amortization of intangible assets 52 47
Depreciation of property, plant and equipment 19 24
OIBDA 267 236
Operating Segments | Recorded Music    
Segment Reporting Information [Line Items]    
Revenues 1,161 1,084
Operating income (loss) 223 191
Amortization of intangible assets 33 29
Depreciation of property, plant and equipment 13 21
OIBDA 269 241
Operating Segments | Music Publishing    
Segment Reporting Information [Line Items]    
Revenues 175 173
Operating income (loss) 18 14
Amortization of intangible assets 19 18
Depreciation of property, plant and equipment 2 1
OIBDA 39 33
Corporate expenses and eliminations    
Segment Reporting Information [Line Items]    
Revenues (1) (1)
Operating income (loss) (45) (40)
Amortization of intangible assets 0 0
Depreciation of property, plant and equipment 4 2
OIBDA $ (41) $ (38)