Retirement Benefits and Trusteed Assets (OPEB - Target Allocations of Plan Assets) (Details) (Other Postretirement Benefit Plan, Defined Benefit [Member])	12 Months Ended
	Dec. 31, 2013
Other Postretirement Benefits Target Allocations of Plan Assets [Line Items]
Target Allocation Percentage of Assets	1
US Large Cap Equity Securities [Member]
Other Postretirement Benefits Target Allocations of Plan Assets [Line Items]
Target Allocation Percentage of Assets	0.17
US Small Cap and Mid Cap Equity Securities [Member]
Other Postretirement Benefits Target Allocations of Plan Assets [Line Items]
Target Allocation Percentage of Assets	0.04
Non US Equity Securities [Member]
Other Postretirement Benefits Target Allocations of Plan Assets [Line Items]
Target Allocation Percentage of Assets	0.2
Fixed Income Securities [Member]
Other Postretirement Benefits Target Allocations of Plan Assets [Line Items]
Target Allocation Percentage of Assets	0.25
Hedge Funds and Similar Investments [Member]
Other Postretirement Benefits Target Allocations of Plan Assets [Line Items]
Target Allocation Percentage of Assets	0.2
Private Equity and Other [Member]
Other Postretirement Benefits Target Allocations of Plan Assets [Line Items]
Target Allocation Percentage of Assets	0.14