Carried Interest Receivable - Carried Interest Receivable Balance (Parenthetical) (Detail) (Apollo Special Opportunities Managed Account, L.P. ("SOMA") [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2013
Apollo Special Opportunities Managed Account, L.P. ("SOMA") [Member]
Receivables [Line Items]
General partner obligation	$ 19.3