Change in actuarial present value of pension benefits [Member] Summary Compensation Table “Stock Awards” column value [Member] Vesting date fair value of equity awards granted and vested in Covered Year [Member] Covered Year-end fair value of outstanding equity awards granted in Covered Year [Member] Includable dividends/earnings paid or accrued on equity awards during Covered Year [Member] Prior service cost of pension benefits [Member] Change in fair value (from prior year-end to vest date in Covered Year) of prior-year equity awards vested in Covered Year [Member] Change in fair value (from prior year-end to Covered Year-end) of equity awards outstanding at Covered Year-end that were granted in prior years [Member] Service cost of pension benefits [Member] Prior year-end fair value of prior-year equity awards forfeited in Covered Year [Member] Summary Compensation Table “Option Awards” column value [Member]