Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenue		$ 825	$ 745	$ 1,742	$ 1,594
Costs and expenses:
Cost of revenue		(415)	(374)	(911)	(823)
Selling, general and administrative expenses	[1]	(282)	(256)	(558)	(532)
Amortization expense		(50)	(63)	(101)	(125)
Total costs and expenses		(747)	(693)	(1,570)	(1,480)
Operating (loss) income		78	52	172	114
Loss on extinguishment of debt			(4)	(32)	(4)
Interest expense, net		(36)	(43)	(76)	(88)
Other (expense) income		(19)	22		30
Income (loss) before income taxes		23	27	64	52
Income tax expense		(3)	(15)	(20)	(12)
Net income		20	12	44	40
Less: Income attributable to noncontrolling interest		(1)	(1)	(3)	(2)
Net income (loss) attributable to Warner Music Group Corp.		$ 19	$ 11	$ 41	$ 38

[1] (a) Includes depreciation expense of: $(13) $(12) $(25) $(25)