Annual Change in Value of Prior Year's Awards Forfeited [Member] Adjustment, Change in Pension Value [Member] Performance Share Range, Minimum Fair Value as of Vesting of Awards Granted and Vested in Year [Member] Value of Dividends or Other Earnings Paid on Stock [Member] Annual Change in Fair Value as of Year-End for Unvested Awards [Member] Performance Share Range, Maximum RSPR Performance Score Adjustment, Prior Pension Service Cost [Member] Fair Value of Current Year Equity Awards as of Year-End [Member] Annual Change in Value as of Vesting of Prior Year's Awards [Member] Adjustment, Pension Service Cost [Member] Adjustment, Annual Stock Award [Member] Adjustment, Equity Award Adjustments [Member]