Consolidated Statements of Comprehensive Income (Unaudited) $ in Millions	3 Months Ended
	Dec. 31, 2019 USD ($)
Statement of Comprehensive Income [Abstract]
Net income	$ 122
Other comprehensive income (loss), net of tax:
Foreign currency adjustment	7
Deferred gain (loss) on derivative financial instruments	3
Other comprehensive income (loss), net of tax	10
Total comprehensive income	132
Less: Income attributable to noncontrolling interest	(2)
Comprehensive income attributable to Warner Music Group Corp.	$ 130