Consolidated Statements of Operations - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Revenue		$ 6,426	$ 6,037	$ 5,919
Costs and expenses:
Cost of revenue		(3,355)	(3,177)	(3,080)
Selling, general and administrative expenses	[1]	(1,879)	(1,826)	(1,862)
Restructuring and impairments		(177)	(40)	0
Amortization expense		(224)	(245)	(263)
Total costs and expenses		(5,635)	(5,288)	(5,205)
Net gain on divestitures		32	41	0
Operating income		823	790	714
Loss on extinguishment of debt		0	(4)	0
Interest expense, net		(161)	(141)	(125)
Other (expense) income, net		(61)	(36)	151
Income before income taxes		601	609	740
Income tax expense		(123)	(170)	(185)
Net income		478	439	555
Less: Income attributable to noncontrolling interest		(43)	(9)	(4)
Net income attributable to Warner Music Group Corp.		435	430	551
Class A Common Stock
Costs and expenses:
Net income attributable to Warner Music Group Corp.		$ 122	$ 119	$ 149
Net income per share attributable to common stockholders:
Basic (in dollars per share)		$ 0.83	$ 0.82	$ 1.06
Diluted (in dollars per share)		$ 0.83	$ 0.82	$ 1.06
Weighted average common shares:
Basic (in shares)		140,882,000	138,070,000	133,662,000
Diluted (in shares)		140,882,000	138,070,000	133,662,000
Class B Common Stock
Costs and expenses:
Net income attributable to Warner Music Group Corp.		$ 313	$ 311	$ 402
Net income per share attributable to common stockholders:
Basic (in dollars per share)		$ 0.83	$ 0.82	$ 1.06
Diluted (in dollars per share)		$ 0.83	$ 0.82	$ 1.06
Weighted average common shares:
Basic (in shares)		376,641,000	377,650,000	381,046,000
Diluted (in shares)		376,641,000	377,650,000	381,046,000

[1] Includes depreciation expense of $(87), $(76), and $(77) for the fiscal years ended September 30, 2023, 2022, and 2021 respectively.