Pension and Other Postretirement Benefits (Details 8) - Defined benefit pension plans [Member]	3 Months Ended	9 Months Ended
	Dec. 31, 2014	Sep. 30, 2014
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
The weighted-average target investment allocations in equity securities	65.00%	70.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
The weighted-average target investment allocations in equity securities	30.00%	20.00%
Real estate securities [Member]
Defined Benefit Plan Disclosure [Line Items]
The weighted-average target investment allocations in equity securities		5.00%
Other Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
The weighted-average target investment allocations in equity securities	5.00%	5.00%