Condensed Consolidated Statements of Operations - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue		$ 1,689	$ 1,554	$ 4,839	$ 4,796
Costs and expenses:
Cost of revenue		(913)	(830)	(2,598)	(2,501)
Selling, general and administrative expenses	[1]	(471)	(462)	(1,395)	(1,384)
Restructuring and impairments		(69)	(1)	(109)	(96)
Amortization expense		(67)	(55)	(186)	(167)
Total costs and expenses		(1,520)	(1,348)	(4,288)	(4,148)
Net gain on divestitures		0	1	0	32
Operating income		169	207	551	680
Interest expense, net		(43)	(40)	(119)	(121)
Other (expense) income		(137)	4	(48)	(9)
(Loss) income before income taxes		(11)	171	384	550
Income tax expense		(5)	(30)	(123)	(120)
Net (loss) income		(16)	141	261	430
Less: Income attributable to noncontrolling interest		0	(2)	(5)	(36)
Net (loss) income attributable to Warner Music Group Corp.		(16)	139	256	394
Class A Common Stock
Costs and expenses:
Net (loss) income attributable to Warner Music Group Corp.		$ (4)	$ 39	$ 73	$ 111
Net income (loss) per share attributable to common stockholders:
Basic (in dollars per share)		$ (0.03)	$ 0.27	$ 0.49	$ 0.75
Diluted (in dollars per share)		$ (0.03)	$ 0.27	$ 0.49	$ 0.75
Weighted average common shares:
Basic (in shares)		145,878,000	141,568,000	144,623,000	140,531,000
Diluted (in shares)		145,878,000	141,568,000	144,623,000	140,531,000
Class B Common Stock
Costs and expenses:
Net (loss) income attributable to Warner Music Group Corp.		$ (12)	$ 100	$ 183	$ 283
Net income (loss) per share attributable to common stockholders:
Basic (in dollars per share)		$ (0.03)	$ 0.27	$ 0.49	$ 0.75
Diluted (in dollars per share)		$ (0.03)	$ 0.27	$ 0.49	$ 0.75
Weighted average common shares:
Basic (in shares)		375,380,000	376,315,000	375,380,000	376,868,000
Diluted (in shares)		375,380,000	376,315,000	375,380,000	376,868,000

[1] Includes depreciation expense of $(29) and $(26) for the three months ended December 31, 2024 and December 31, 2023, respectively.