Employee Benefits Schedule of Allocation of Plan Assets (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Actual [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity Securities	67.00%	68.00%
Debt Securities	33.00%	32.00%
defined benefit pension plan asset allocation	100.00%	100.00%
Actual [Member] | Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity Securities	58.00%	63.00%
Debt Securities	42.00%	37.00%
defined benefit pension plan asset allocation	100.00%	100.00%
Actual [Member] | Non Qualified Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity Securities	24.00%	17.00%
Debt Securities	1.00%	6.00%
Insurance contracts	75.00%	77.00%
defined benefit pension plan asset allocation	100.00%	100.00%
Target [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity Securities	67.00%	67.00%
Debt Securities	33.00%	33.00%
defined benefit pension plan asset allocation	100.00%	100.00%
Target [Member] | Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity Securities	58.00%	72.00%
Debt Securities	42.00%	28.00%
defined benefit pension plan asset allocation	100.00%	100.00%
Target [Member] | Non Qualified Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity Securities	16.00%	17.00%
Debt Securities	9.00%	10.00%
Insurance contracts	75.00%	73.00%
defined benefit pension plan asset allocation	100.00%	100.00%