Employee Benefits (Narrative) (Details) (USD $)	0 Months Ended					0 Months Ended	9 Months Ended
	Feb. 28, 2014	Feb. 28, 2014 Retirement Income Plan	Dec. 31, 2013 Retirement Income Plan	Feb. 28, 2014 Excess Benefit Plan	Dec. 31, 2013 Excess Benefit Plan	Apr. 01, 2014 Retirement Plans	Sep. 30, 2014 Retirement Plans	Feb. 28, 2014 Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Employer Contribution							$ 10,400,000
Defined Benefit Plan, Expected Contributions in Current Fiscal Year							10,900,000
Defined benefit plans revisions effective date						Apr. 01, 2014
Defined Benefit Plan, Remeasurement Date	Feb. 28, 2014
Defined Benefit Plan, Discount Rate		4.60%	4.90%	4.50%	4.90%
Defined Benefit Plan, Decrease in Accumulated Benefit Obligation due to Plan Amendment								19,700,000
Increase in Other Comprehensive Income Arising During Period, before Tax								19,700,000
Defined Benefit Plan Increase in Expected Future Benefit Payments due to Plan Amendment							21,700,000
Defined Benefit Plan, Decrease in Net Periodic Benefit Cost due to Plan Amendment							$ 6,200,000