Earnings Per Share Earnings Per Share (Policies)

12 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Earnings Per Share, Policy [Policy Text Block]

Earnings Per Share

Basic earnings per share attributable to Legg Mason, Inc. shareholders ("EPS") is calculated by dividing Net Income (Loss) Attributable to Legg Mason, Inc. (adjusted by removing earnings allocated to participating securities) by the weighted-average number of shares outstanding, which excludes participating securities. Legg Mason has issued to employees restricted stock and restricted stock units that are deemed to be participating securities prior to vesting, because the related unvested restricted shares/units entitle their holder to nonforfeitable dividend rights. In this circumstance, accounting guidance requires a “two-class method” for EPS calculations that excludes earnings (potentially both distributed and undistributed) allocated to participating securities and does not allocate losses to participating securities.

Diluted EPS is similar to basic EPS, but the effect of potential common shares is included in the calculation unless the potential common shares are antidilutive. For periods with a net loss, potential common shares other than participating securities, are considered antidilutive and are excluded from the calculation.

See Note 12 for additional discussion of EPS.