Commitments and Contingencies	6 Months Ended
Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings With respect to all significant litigation matters, we consider the likelihood of a negative outcome. If we determine the likelihood of a negative outcome is probable and the amount of the loss can be reasonably estimated, we record an estimated loss for the expected outcome of the litigation. If the likelihood of a negative outcome is reasonably possible and we are able to determine an estimate of the possible loss or range of loss in excess of amounts already accrued, if any, we disclose that fact together with the estimate of the possible loss or range of loss. However, it is often difficult to predict the outcome or estimate a possible loss or range of loss because litigation is subject to inherent uncertainties, particularly when plaintiffs allege substantial or indeterminate damages. Such is also the case when the litigation is in its early stages or when the litigation is highly complex or broad in scope. In these cases, we disclose that we are unable to predict the outcome or estimate a possible loss or range of loss. During the first quarter of 2012, we received a legal letter of claim (“Letter of Claim”) sent on behalf of Philips Pension Trustees Limited and Philips Electronics U.K. Limited (“Philips”), a former pension fund client, alleging that AllianceBernstein Limited (one of our subsidiaries organized in the U.K.) was negligent and failed to meet certain applicable standards of care with respect to the initial investment in, and management of, a £500 million portfolio of U.S. mortgage-backed securities. Philips has alleged damages ranging between $177 million and $234 million, plus compound interest on an alleged $125 million of realized losses in the portfolio. On January 2, 2014, Philips filed a claim form (“Claim”) in the High Court of Justice in London, England, which formally commenced litigation with respect to the allegations in the Letter of Claim. We believe that any losses to Philips resulted from adverse developments in the U.S. housing and mortgage market that precipitated the financial crisis in 2008 and not from any negligence or other failure or malfeasance on our part. We believe that we have strong defenses to these claims, which are set forth in our October 12, 2012 response to the Letter of Claim and our June 27, 2014 Statement of Defence in response to the Claim, and intend to defend this matter vigorously. Currently, we are unable to estimate a reasonably possible range of loss because the matter remains in its early stages. In addition to the Claim discussed immediately above, we are involved in various other matters, including regulatory inquiries, administrative proceedings and litigation, some of which allege significant damages. In management’s opinion, an adequate accrual has been made as of June 30, 2015 to provide for any probable losses regarding any litigation matters for which we can reasonably estimate an amount of loss. It is reasonably possible that we could incur additional losses pertaining to these matters, but currently we cannot estimate any such additional losses. Management, after consultation with legal counsel, currently believes that the outcome of any individual matter that is pending or threatened, or all of them combined, will not have a material adverse effect on our results of operations, financial condition or liquidity. However, any inquiry, proceeding or litigation has an element of uncertainty; management cannot determine whether further developments relating to any individual matter that is pending or threatened, or all of them combined, will have a material adverse effect on our results of operation, financial condition or liquidity in any future reporting period.

Commitments and Contingencies

Legal Proceedings

With respect to all significant litigation matters, we consider the likelihood of a negative outcome. If we determine the likelihood of a negative outcome is probable and the amount of the loss can be reasonably estimated, we record an estimated loss for the expected outcome of the litigation. If the likelihood of a negative outcome is reasonably possible and we are able to determine an estimate of the possible loss or range of loss in excess of amounts already accrued, if any, we disclose that fact together with the estimate of the possible loss or range of loss. However, it is often difficult to predict the outcome or estimate a possible loss or range of loss because litigation is subject to inherent uncertainties, particularly when plaintiffs allege substantial or indeterminate damages. Such is also the case when the litigation is in its early stages or when the litigation is highly complex or broad in scope. In these cases, we disclose that we are unable to predict the outcome or estimate a possible loss or range of loss.

During the first quarter of 2012, we received a legal letter of claim (“Letter of Claim”) sent on behalf of Philips Pension Trustees Limited and Philips Electronics U.K. Limited (“Philips”), a former pension fund client, alleging that AllianceBernstein Limited (one of our subsidiaries organized in the U.K.) was negligent and failed to meet certain applicable standards of care with respect to the initial investment in, and management of, a £500 million portfolio of U.S. mortgage-backed securities. Philips has alleged damages ranging between $177 million and $234 million, plus compound interest on an alleged $125 million of realized losses in the portfolio. On January 2, 2014, Philips filed a claim form (“Claim”) in the High Court of Justice in London, England, which formally commenced litigation with respect to the allegations in the Letter of Claim.

We believe that any losses to Philips resulted from adverse developments in the U.S. housing and mortgage market that precipitated the financial crisis in 2008 and not from any negligence or other failure or malfeasance on our part. We believe that we have strong defenses to these claims, which are set forth in our October 12, 2012 response to the Letter of Claim and our June 27, 2014 Statement of Defence in response to the Claim, and intend to defend this matter vigorously. Currently, we are unable to estimate a reasonably possible range of loss because the matter remains in its early stages.

In addition to the Claim discussed immediately above, we are involved in various other matters, including regulatory inquiries, administrative proceedings and litigation, some of which allege significant damages.

In management’s opinion, an adequate accrual has been made as of June 30, 2015 to provide for any probable losses regarding any litigation matters for which we can reasonably estimate an amount of loss. It is reasonably possible that we could incur additional losses pertaining to these matters, but currently we cannot estimate any such additional losses.

Management, after consultation with legal counsel, currently believes that the outcome of any individual matter that is pending or threatened, or all of them combined, will not have a material adverse effect on our results of operations, financial condition or liquidity. However, any inquiry, proceeding or litigation has an element of uncertainty; management cannot determine whether further developments relating to any individual matter that is pending or threatened, or all of them combined, will have a material adverse effect on our results of operation, financial condition or liquidity in any future reporting period.