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Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 61	$ (519)	$ 277	$ (471)
Other comprehensive income (loss), net of tax:
Foreign currency adjustment	12	17	19	9
Deferred gain (loss) on derivative financial instruments	3	(2)	9	(22)
Other comprehensive income (loss), net of tax	15	15	28	(13)
Total comprehensive income (loss)	76	(504)	305	(484)
Less: Income attributable to noncontrolling interest	0	(1)	(1)	(3)
Comprehensive income (loss) attributable to Warner Music Group Corp.	$ 76	$ (505)	$ 304	$ (487)

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