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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 92	$ 117	$ 280	$ 216
Other comprehensive (loss) income, net of tax:
Foreign currency adjustment	(25)	(27)	(50)	7
Deferred gain on derivative financial instruments	14	3	21	6
Other comprehensive (loss) income, net of tax	(11)	(24)	(29)	13
Total comprehensive income	81	93	251	229
Less: Income attributable to noncontrolling interest	0	0	(1)	(1)
Comprehensive income attributable to Warner Music Group Corp.	$ 81	$ 93	$ 250	$ 228

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