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Units Outstanding (Tables)
6 Months Ended
Jun. 30, 2015
Limited Partners' Capital Account [Abstract]  
Changes in Holding Units Outstanding
Changes in AB Holding Units outstanding during the six-month period ended June 30, 2015 are as follows:

Outstanding as of December 31, 2014
100,756,999

Options exercised
526,201

Units issued
207,945

Units retired
(778,573
)
Outstanding as of June 30, 2015
100,712,572