Acquisition of Parlophone Label Group - Additional Information (Detail) (PLG [Member]) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended	5 Months Ended	12 Months Ended
	Feb. 06, 2013 GBP (£)	Sep. 30, 2013 USD ($)	Jun. 30, 2013 GBP (£)	Sep. 30, 2013 USD ($)
Business Acquisition [Line Items]
Percentage of ownership on acquisition	100.00%
Business acquisition, cash paid	£ 487		£ 487
Business acquisition, date of agreement				Feb. 06, 2013
Professional fees and integration costs related to Acquisition				38
Additional Transaction fee under Management Agreement in relation to Acquisition				11
Revenues		59
Operating loss		$ 32