Organization and Basis of Presentation - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2013 Segment
Organization And Basis Of Presentation [Line Items]
Number of business segments	3
Apollo Global Management, LLC [Member]
Organization And Basis Of Presentation [Line Items]
Economic interest	38.00%
Non-Controlling Interests in Apollo Operating Group [Member]
Organization And Basis Of Presentation [Line Items]
Economic interest	62.00%
Apollo Global Management, LLC [Member]
Organization And Basis Of Presentation [Line Items]
Number of Class A shares resold	24.3
Price per share	$ 25.00
Shares issued upon the exercise in full of the underwriters' option	3.2
Shares issued in exchange of subsidiary non-controlling interest	8.8
Stock issuance costs	$ 3.0
Transfer from non-controlling interest	$ 50.8
Apollo Global Management, LLC [Member] | Maximum [Member]
Organization And Basis Of Presentation [Line Items]
Economic interest	64.40%
Apollo Global Management, LLC [Member] | Minimum [Member]
Organization And Basis Of Presentation [Line Items]
Economic interest	62.00%
Non-Controlling Interests in Apollo Operating Group [Member] | Maximum [Member]
Organization And Basis Of Presentation [Line Items]
Economic interest	38.00%
Non-Controlling Interests in Apollo Operating Group [Member] | Minimum [Member]
Organization And Basis Of Presentation [Line Items]
Economic interest	35.60%