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Debt
3 Months Ended
Mar. 31, 2015
Debt [Abstract]  
Debt
14.Debt

As of March 31, 2015 and December 31, 2014, AB had $500.6 million and $489.0 million, respectively, in commercial paper outstanding with weighted average interest rates of approximately 0.3% for both periods. The commercial paper is short term in nature, and as such, recorded value is estimated to approximate fair value (and considered a Level 2 security in the fair value hierarchy). Average daily borrowings of commercial paper during the first three months of 2015 and the full year 2014 were $423.9 million and $335.0 million, respectively, with weighted average interest rates of approximately 0.3% and 0.2%, respectively.