DELISTED - The Fund seeks to achieve its investment objective by investing under normal circumstances at least 50% of its assets in debt securities whose interest is, in the opinion of bond counsel for the issuer at the time of issuance, exempt from federal income tax ("Municipal Bonds"), with the remainder of the Fund's assets invested in inflation-indexed bonds of varying maturities issued by the U.S. government, its agencies or instrumentalities (such as Treasury Inflation Protected Securities ("TIPS")), and other types of Fixed Income Instruments, which may be represented by forwards or derivatives such as options, futures contracts or swap agreements (such as CPI swaps). "Fixed Income Instruments" include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. "Real return" equals total return less the estimated cost of inflation. The average portfolio duration of the fixed income portion of this Fund will normally vary based on Pacific Investment Management Company LLC's ("PIMCO") forecast for interest rates and under normal market conditions is not expected to exceed eight years. Duration is a measure used to determine the sensitivity of a security's price to changes in interest rates. The longer a security's duration, the more sensitive it will be to changes in interest rates.Municipal Bonds generally are issued by or on behalf of states and local governments and their agencies, authorities and other instrumentalities. The Fund does not intend to invest in securities whose interest is subject to the federal alternative minimum tax. The Fund may invest 25% or more of its total assets in Municipal Bonds that finance education, health care, housing, transportation, utilities and other similar projects, and 25% or more of its total assets in industrial development bonds.Inflation-indexed bonds are fixed income securities that are structured to provide protection against inflation. The value of the bond's principal or the interest income paid on the bond is adjusted to track changes in an official inflation measure. The U.S. Treasury uses the Consumer Price Index for All Urban Consumers ("CPI") as the inflation measure. Effective duration takes into account that for certain bonds expected cash flows will fluctuate as interest rates change and is defined in nominal yield terms, which is market convention for most bond investors and managers. Because market convention for bonds is to use nominal yields to measure duration, durations for real return bonds, which are based on real yields, are converted to nominal durations through a conversion factor. The resulting nominal duration typically can range from 20% and 90% of the respective real duration. All inflation-indexed security holdings will be measured in effective (nominal) duration terms.As part of its principal investment strategies, the Fund's investment in derivatives may consist largely of swaps (including CPI swaps) where the Fund receives inflation-indexed payments. A CPI swap is a fixed maturity, over-the-counter derivative in which the investor receives the "realized" rate of inflation as measured by the CPI over the life of the swap. The investor in turn pays a fixed annualized rate over the life of the swap. This fixed rate is often referred to as the "breakeven inflation" rate and is generally representative of the difference between treasury yields and TIPS yields of similar maturities at the initiation of the swap. CPI swaps are typically in "bullet" format, where all cash flows are exchanged at maturity. The Fund may also invest in municipal inflation-indexed securities.The Fund may invest in investment-grade securities rated Baa or higher by Moody's Investors Service, Inc. ("Moody's"), or equivalently rated by Standard & Poor's Ratings Services ("S&P") or Fitch, Inc. ("Fitch"), or, if unrated, determined by PIMCO to be of comparable quality. The Fund will normally limit its non-U.S. dollar-denominated securities exposure to 5% of its total assets.The Fund seeks to minimize shareholders' tax liability in connection with the Fund's distribution of realized capital gain by minimizing the net gains available for distribution. In doing so, the Fund typically sells securities when the anticipated performance benefit justifies the resulting gain. This strategy often includes minimizing the sale of securities with large unrealized gain, holding securities long enough to avoid short-term capital gains taxes, selling securities with a higher cost basis first and offsetting capital gains realized in one security by selling another security at a capital loss. In addition, the Fund seeks to minimize distributions that are taxed as ordinary income.The Fund may invest in derivative instruments, such as options, futures contracts or swap agreements. The Fund may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis and may engage in short sales. The Fund may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy backs or dollar rolls).