Pension Plans and Other Postretirement Benefits (Details 13) - Pension Benefits [Member]	12 Months Ended
	Dec. 31, 2015
U.S. equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocations range, Minimum	18.00%
Target asset allocations range, Maximum	40.00%
International equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocations range, Minimum	7.00%
Target asset allocations range, Maximum	17.00%
Global debt securities and cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocations range, Minimum	35.00%
Target asset allocations range, Maximum	55.00%
Private equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocations range, Minimum	0.00%	[1]
Target asset allocations range, Maximum	10.00%	[1]
Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocations range, Minimum	0.00%	[1]
Target asset allocations range, Maximum	10.00%	[1]
Real estate and other [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocations range, Minimum	0.00%	[1]
Target asset allocations range, Maximum	10.00%	[1]
Private Equity, Hedge Funds, and Real Estate and Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocations range, Minimum	18.00%
Target asset allocations range, Maximum	20.00%

[1] Have a combined target allocation of 18% and a 20% limit.