Interim Pension and Other Postretirement Benefits (Details) (USD $)	0 Months Ended	3 Months Ended		6 Months Ended
	Oct. 02, 2013	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Pension Benefits [Member]
Components of net periodic pension cost [Abstract]
Service Cost		$ 4,738,000	$ 5,203,000	$ 9,476,000	$ 10,405,000
Interest Cost		6,824,000	6,023,000	13,648,000	12,048,000
Expected return on assets		(5,900,000)	(5,738,000)	(11,801,000)	(11,477,000)
Amortization of transition (asset)/obligation		0	0	0	0
Amortization of prior service (credit)/cost		(34,000)	(36,000)	(68,000)	(71,000)
Amortization of actuarial (gain) loss		3,930,000	5,562,000	7,862,000	11,123,000
Settlement loss	4,539,000			4,539,000	0
Net periodic pension cost		9,558,000	11,014,000	23,656,000	22,028,000
Defined Benefit Plan Weighted Average Assumptions Used In Calculating Net Periodic Benefit Cost Abstract
Discount Rate		4.95%	4.04%	4.95%	4.04%
Rate of compensation increase		3.50%	3.50%	3.50%	3.50%
Expected return on plan assets		7.25%	7.75%	7.25%	7.75%
Current Year Benefit Plan Contributions [Abstract]
Contributions Actual				9,100,000
Benefit Payment	16,800,000
Pension Benefits [Member] | Minimum [Member]
Current Year Benefit Plan Contributions [Abstract]
Defined Benefit Plan, Expected Contributions in Current Fiscal Year				10,000,000
Pension Benefits [Member] | Maximum [Member]
Current Year Benefit Plan Contributions [Abstract]
Defined Benefit Plan, Expected Contributions in Current Fiscal Year				35,000,000
Other Benefits [Member]
Components of net periodic pension cost [Abstract]
Service Cost		4,196,000	4,700,000	8,392,000	9,400,000
Interest Cost		3,988,000	3,241,000	7,976,000	6,482,000
Expected return on assets		(1,292,000)	(997,000)	(2,584,000)	(1,994,000)
Amortization of transition (asset)/obligation		68,000	270,000	136,000	540,000
Amortization of prior service (credit)/cost		(362,000)	(363,000)	(725,000)	(725,000)
Amortization of actuarial (gain) loss		158,000	1,049,000	316,000	2,098,000
Settlement loss				0	0
Net periodic pension cost		6,756,000	7,900,000	13,511,000	15,801,000
Defined Benefit Plan Weighted Average Assumptions Used In Calculating Net Periodic Benefit Cost Abstract
Discount Rate		4.95%	4.04%	4.95%	4.04%
Expected return on plan assets		4.60%	4.70%	4.60%	4.70%
Current Year Benefit Plan Contributions [Abstract]
Contributions Actual				11,600,000
Other Benefits [Member] | Minimum [Member]
Current Year Benefit Plan Contributions [Abstract]
Defined Benefit Plan, Expected Contributions in Current Fiscal Year				20,000,000
Other Benefits [Member] | Maximum [Member]
Current Year Benefit Plan Contributions [Abstract]
Defined Benefit Plan, Expected Contributions in Current Fiscal Year				$ 25,000,000