Equity Based Compensation - Additional Information (Detail) In Millions, unless otherwise specified	9 Months Ended
	Mar. 31, 2014
Performance Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units granted	4.3
Performance Stock Units [Member] | Settled in Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units granted	2.7
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units granted	0.1
Restricted Stock Units [Member] | Settled in Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units granted	0.1
2013 LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award shares authorized	30