Investments - Investments of AAA (Excluding VIEs) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Investment Cost	$ 1,588,840	$ 1,649,828
Investments, at Fair Value	1,736,703	1,744,412
Percentage of Net Assets of Consolidated Funds	100.20%	100.00%
Equity [Member] | Athene Holding Ltd. [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Investment Cost	1,617,445	1,578,954
Investments, at Fair Value	$ 1,276,366	$ 1,276,366
Percentage of Net Assets of Consolidated Funds	96.10%	93.40%