Cash and Securities Segregated Under Federal Regulations and Other Requirements

12 Months Ended

Dec. 31, 2017

Brokers and Dealers [Abstract]

Cash and Securities Segregated Under Federal Regulations and Other Requirements

Cash and Securities Segregated Under Federal Regulations and Other Requirements

As of December 31, 2017 and 2016, $0.8 billion and $0.9 billion, respectively, of U.S. Treasury Bills were segregated in a special reserve bank custody account for the exclusive benefit of our brokerage customers under Rule 15c3-3 of the Exchange Act.

During 2016, one of our subsidiaries, which serves as the distributor of our U.S. mutual funds, maintained several special bank accounts for the exclusive benefit of customers. As of December 31, 2016, $52.9 million of cash was segregated in these bank accounts. During the fourth quarter of 2017, these bank accounts were transferred to another AB subsidiary and no longer designated for the exclusive benefit of customers; as such, the bank accounts are no longer considered segregated cash.