Year End Fair Value of Outstanding and Unvested Equity Awards Granted in the Covered Year [Member] Beauchamp [Member] Peer Group Total Shareholder Return Amount, Two Adjustment To Compensation Amount, Equity Awards Change in Fair Value of Prior Year Equity Awards Vested in the Covered Year [Member] Williams [Member] Fair Value of Vesting Date of Equity Awards Granted and Vested in the Covered Year [Member] Change in Fair Value of Outstanding and Unvested Equity Awards Granted in the Prior Year [Member] Equity Awards from Summary Compensation Table [Member] Total Adjustments for Fair Value of Equity Awards [Member]