Deduction for amounts reported under the “Equity Awards” column in the Summary Compensation Table [Member] Deduction for fair value as of prior year-end of stock and option awards granted in any prior year that were forfeited during year [Member] Deduction for amounts reported under the “Option Awards” column in the Summary Compensation Table [Member] Increase for fair value of stock and option awards granted during the year that are outstanding and unvested as of year-end [Member] Increase/deduction for change in fair value as of year-end (from prior year-end) of stock and option awards granted in any prior year that were outstanding and unvested as of year-end [Member] Increase for fair value as of vesting date of stock and option awards granted and vested in the same year [Member] Increase/deduction for change in fair value as of vesting date (from prior year-end) of stock and option awards granted in any prior year for which all vesting conditions were satisfied during the year or at year-end [Member] Deduction for fair value as of prior year-end of stock and option awards granted in any prior year that were forfeited during the year [Member] Increase for dollar value of any dividends or other earnings paid on stock or option awards in the year prior to the vesting date that are not otherwise included in total compensation for the year [Member] Barry Gosin [Member] Howard Lutnick [Member] Increase/decrease for change in fair value from grant date of stock and option awards granted during year that are outstanding and unvested as of year-end [Member] Increase/deduction for change in fair value as of vesting date (from prior year-end) of stock and option awards granted in any prior year for which all vesting conditions were satisfied during year or at year-end [Member] Deduction for change in actuarial present value of accumulated benefit under all defined benefit and actuarial pension plans reported in the Summary Compensation Table [Member] Increase for aggregate of service cost and prior service cost for all defined benefit and actuarial pension plans reported in the Summary Compensation Table [Member]