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Retirement Plan And Other Post-Retirement Benefits (Tables)
 12 Months Ended
Sep. 30, 2014
Defined Benefit Plan Disclosure [Line Items]  
Schedule Of Benefit Obligations, Plan Assets And Funded Status
 
Retirement Plan
 
Other Post-Retirement Benefits
 
Year Ended September 30
 
Year Ended September 30
 
2014
 
2013
 
2012
 
2014
 
2013
 
2012
 
(Thousands)
Change in Benefit Obligation
 
 
 
 
 
 
 
 
 
 
 
Benefit Obligation at Beginning of Period
$
946,305

 
$
1,070,744

 
$
949,777

 
$
460,634

 
$
561,263

 
$
485,452

Service Cost
11,987

 
15,846

 
14,202

 
2,939

 
4,705

 
4,016

Interest Cost
43,574

 
36,498

 
41,526

 
21,308

 
19,212

 
21,315

Plan Participants’ Contributions
—

 
—

 
—

 
2,265

 
2,141

 
1,956

Retiree Drug Subsidy Receipts
—

 
—

 
—

 
1,419

 
1,526

 
1,528

Actuarial (Gain) Loss
53,887

 
(121,631
)
 
120,338

 
1,087

 
(104,455
)
 
71,708

Benefits Paid
(56,254
)
 
(55,152
)
 
(55,099
)
 
(24,069
)
 
(23,758
)
 
(24,712
)
Benefit Obligation at End of Period
$
999,499

 
$
946,305

 
$
1,070,744

 
$
465,583

 
$
460,634

 
$
561,263

Change in Plan Assets
 
 
 
 
 
 
 
 
 
 
 
Fair Value of Assets at Beginning of Period
$
799,307

 
$
701,676

 
$
601,719

 
$
472,392

 
$
414,134

 
$
351,990

Actual Return on Plan Assets
93,238

 
98,783

 
111,034

 
44,898

 
61,715

 
63,552

Employer Contributions
33,500

 
54,000

 
44,022

 
2,115

 
18,160

 
21,348

Plan Participants’ Contributions
—

 
—

 
—

 
2,265

 
2,141

 
1,956

Benefits Paid
(56,254
)
 
(55,152
)
 
(55,099
)
 
(24,069
)
 
(23,758
)
 
(24,712
)
Fair Value of Assets at End of Period
$
869,791

 
$
799,307

 
$
701,676

 
$
497,601

 
$
472,392

 
$
414,134

Net Amount Recognized at End of Period (Funded Status)
$
(129,708
)
 
$
(146,998
)
 
$
(369,068
)
 
$
32,018

 
$
11,758

 
$
(147,129
)
Amounts Recognized in the Balance Sheets Consist of:
 
 
 
 
 
 
 
 
 
 
 
Non-Current Liabilities
$
(129,708
)
 
$
(146,998
)
 
$
(369,068
)
 
$
(4,494
)
 
$
(11,016
)
 
$
(147,129
)
Non-Current Assets
—

 
—

 
—

 
36,512

 
22,774

 
—

Net Amount Recognized at End of Period
$
(129,708
)
 
$
(146,998
)
 
$
(369,068
)
 
$
32,018

 
$
11,758

 
$
(147,129
)
Accumulated Benefit Obligation
$
940,068

 
$
886,942

 
$
986,223

 
N/A

 
N/A

 
N/A

Weighted Average Assumptions Used to Determine Benefit Obligation at September 30
 
 
 
 
 
 
 
 
 
 
 
Discount Rate
4.25
%
 
4.75
%
 
3.50
%
 
4.25
%
 
4.75
%
 
3.50
%
Rate of Compensation Increase
4.75
%
 
4.75
%
 
4.75
%
 
4.75
%
 
4.75
%
 
4.75
%
 
Retirement Plan
 
Other Post-Retirement Benefits
 
Year Ended September 30
 
Year Ended September 30
 
2014
 
2013
 
2012
 
2014
 
2013
 
2012
 
(Thousands)
Components of Net Periodic Benefit Cost
 
 
 
 
 
 
 
 
 
 
 
Service Cost
$
11,987

 
$
15,846

 
$
14,202

 
$
2,939

 
$
4,705

 
$
4,016

Interest Cost
43,574

 
36,498

 
41,526

 
21,308

 
19,212

 
21,315

Expected Return on Plan Assets
(59,974
)
 
(57,346
)
 
(59,701
)
 
(37,424
)
 
(32,872
)
 
(28,971
)
Amortization of Prior Service Cost (Credit)
210

 
238

 
269

 
(2,138
)
 
(2,138
)
 
(2,138
)
Amortization of Transition Amount
—

 
—

 
—

 
—

 
8

 
10

Recognition of Actuarial Loss(1)
36,007

 
52,776

 
39,615

 
2,645

 
20,892

 
24,057

Net Amortization and Deferral for Regulatory Purposes
8,151

 
(10,406
)
 
(6,900
)
 
23,263

 
11,844

 
6,162

Net Periodic Benefit Cost
$
39,955

 
$
37,606

 
$
29,011

 
$
10,593

 
$
21,651

 
$
24,451

Weighted Average Assumptions Used to Determine Net Periodic Benefit Cost at September 30
 
 
 
 
 
 
 
 
 
 
 
Discount Rate
4.75
%
 
3.50
%
 
4.50
%
 
4.75
%
 
3.50
%
 
4.50
%
Expected Return on Plan Assets
8.00
%
 
8.00
%
 
8.25
%
 
8.00
%
 
8.00
%
 
8.25
%
Rate of Compensation Increase
4.75
%
 
4.75
%
 
4.75
%
 
4.75
%
 
4.75
%
 
4.75
%
 
(1)
Distribution Corporation’s New York jurisdiction calculates the amortization of the actuarial loss on a vintage year basis over 10 years, as mandated by the NYPSC. All the other subsidiaries of the Company utilize the corridor approach.
Schedule Of Cumulative Amounts Recognized In AOCI (Loss) And Regulatory Assets And Liabilities
 
Retirement
Plan
 
Other
Post-Retirement
Benefits
 
Non-Qualified
Benefit Plans
 
(Thousands)
Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Regulatory Assets and Regulatory Liabilities(1)
 
 
 
 
 
Net Actuarial Loss
$
(226,897
)
 
$
(32,082
)
 
$
(23,532
)
Prior Service (Cost) Credit
(856
)
 
6,940

 
—

Net Amount Recognized
$
(227,753
)
 
$
(25,142
)
 
$
(23,532
)
Changes to Accumulated Other Comprehensive Income (Loss), Regulatory Assets and Regulatory Liabilities Recognized During Fiscal 2014(1)
 
 
 
 
 
Decrease (Increase) in Actuarial Loss, excluding amortization(2)
$
(20,622
)
 
$
6,387

 
$
(5,424
)
Change due to Amortization of Actuarial Loss
36,007

 
2,645

 
3,008

Prior Service (Cost) Credit
210

 
(2,138
)
 
—

Net Change
$
15,595

 
$
6,894

 
$
(2,416
)
Amounts Expected to be Recognized in Net Periodic Benefit Cost in the Next Fiscal Year(1)
 
 
 
 
 
Net Actuarial Loss
$
(36,129
)
 
$
(4,148
)
 
$
(2,925
)
Prior Service (Cost) Credit
(183
)
 
1,913

 
—

Net Amount Expected to be Recognized
$
(36,312
)
 
$
(2,235
)
 
$
(2,925
)
 
(1)
Amounts presented are shown before recognizing deferred taxes.
(2)
Amounts presented include the impact of actuarial gains/losses related to return on assets, as well as the Actuarial (Gain) Loss amounts presented in the Change in Benefit Obligation.
Schedule Of Expected Benefit Payments
 
Benefit Payments
 
Subsidy Receipts
2015
$
25,594

 
$
(1,955
)
2016
$
26,909

 
$
(2,143
)
2017
$
28,113

 
$
(2,323
)
2018
$
29,226

 
$
(2,511
)
2019
$
30,173

 
$
(2,708
)
2020 through 2024
$
163,470

 
$
(16,104
)
Schedule Of Health Care Cost Trend Rates
 
2014
 
 
2013
 
 
2012
 
Rate of Increase for Pre Age 65 Participants
7.10
%
(1)
 
7.28
%
(1)
 
7.46
%
(1)
Rate of Increase for Post Age 65 Participants
6.73
%
(1)
 
6.78
%
(1)
 
6.84
%
(1)
Annual Rate of Increase in the Per Capita Cost of Covered Prescription Drug Benefits
7.47
%
(1)
 
7.78
%
(1)
 
8.08
%
(1)
Annual Rate of Increase in the Per Capita Medicare Part B Reimbursement
6.73
%
(1)
 
6.78
%
(1)
 
6.84
%
(1)
Annual Rate of Increase in the Per Capita Medicare Part D Subsidy
6.79
%
(1)
 
7.03
%
(1)
 
7.13
%
(1)
 
(1)
It was assumed that this rate would gradually decline to 4.5% by 2028.
Other Post-Retirement Benefit Plans [Member]
  
Defined Benefit Plan Disclosure [Line Items]  
Schedule Of Fair Value Of Plan Assets
 
Total Fair Value
Amounts at
September 30, 2014
 
Level 1
 
Level 2
 
Level 3
Other Post-Retirement Benefit Assets held in VEBA Trusts
 
 
 
 
 
 
 
Collective Trust Funds — Domestic Equities
$
148,219

 
$
—

 
$
148,219

 
$
—

Collective Trust Funds — International Equities
54,881

 
—

 
54,881

 
—

Exchange Traded Funds — Fixed Income
236,513

 
236,513

 
—

 
—

Cash Held in Collective Trust Funds
6,412

 
—

 
6,412

 
—

Total VEBA Trust Investments
446,025

 
236,513

 
209,512

 
—

401(h) Investments
54,921

 
14,105

 
37,907

 
2,909

Total Investments (including 401(h) Investments)
$
500,946

 
$
250,618

 
$
247,419

 
$
2,909

Miscellaneous Accruals (Including Current and Deferred Taxes, Claims Incurred But Not Reported, Administrative)
(3,345
)
 
 
 
 
 
 
Total Other Post-Retirement Benefit Assets
$
497,601

 
 
 
 
 
 
 
 
Total Fair Value
Amounts at
September 30, 2013
 
Level 1
 
Level 2
 
Level 3
Other Post-Retirement Benefit Assets held in VEBA Trusts
 
 
 
 
 
 
 
Collective Trust Funds — Domestic Equities
$
205,623

 
$
—

 
$
205,623

 
$
—

Collective Trust Funds — International Equities
87,613

 
—

 
87,613

 
—

Exchange Traded Funds — Fixed Income
122,558

 
122,558

 
—

 
—

Real Estate
55

 
—

 
—

 
55

Cash Held in Collective Trust Funds
11,678

 
—

 
11,678

 
—

Total VEBA Trust Investments
427,527

 
122,558

 
304,914

 
55

401(h) Investments
49,453

 
20,141

 
26,706

 
2,606

Total Investments (including 401(h) Investments)
$
476,980

 
$
142,699

 
$
331,620

 
$
2,661

Miscellaneous Accruals (Including Current and Deferred Taxes, Claims Incurred But Not Reported, Administrative)
(4,588
)
 
 
 
 
 
 
Total Other Post-Retirement Benefit Assets
$
472,392

 
 
 
 
 
 
Schedule Of Significant Unobservable Input Changes In Plan Assets
 
Other Post-Retirement Benefit Level 3 Assets
(Thousands)
 
VEBA
Trust
Investments
 
Including
401(h)
Investments
 
Other
Post-Retirement
Benefit
Investments
 
Real
Estate
 
Balance at September 30, 2012
$
1,305

 
$
2,680

 
$
3,985

Realized Gains/(Losses)
940

 
(4
)
 
936

Unrealized Gains/(Losses)
385

 
156

 
541

Purchases
—

 
11

 
11

Sales
(2,575
)
 
(237
)
 
(2,812
)
Balance at September 30, 2013
55

 
2,606

 
2,661

Realized Gains/(Losses)
(40
)
 
4

 
(36
)
Unrealized Gains/(Losses)
—

 
239

 
239

Purchases
—

 
65

 
65

Sales
(15
)
 
(5
)
 
(20
)
Balance at September 30, 2014
$
—

 
$
2,909

 
$
2,909
Retirement Plan [Member]
  
Defined Benefit Plan Disclosure [Line Items]  
Schedule Of Fair Value Of Plan Assets
 
Total Fair Value
Amounts at
September 30, 2014
 
Level 1
 
Level 2
 
Level 3
Retirement Plan Investments
 
 
 
 
 
 
 
Domestic Equities(1)
$
268,649

 
$
171,979

 
$
96,670

 
$
—

International Equities(2)
80,957

 
1,969

 
78,988

 
—

Global Equities(3)
104,238

 
—

 
104,238

 
—

Domestic Fixed Income(4)
299,494

 
63,187

 
236,307

 
—

International Fixed Income(5)
1,240

 
508

 
732

 
—

Global Fixed Income(6)
93,704

 
—

 
93,704

 
—

Hedge Fund Investments
45,213

 
—

 
—

 
45,213

Real Estate
3,792

 
—

 
—

 
3,792

Cash and Cash Equivalents
33,544

 
—

 
33,544

 
—

Total Retirement Plan Investments
930,831

 
237,643

 
644,183

 
49,005

401(h) Investments
(54,921
)
 
(14,105
)
 
(37,907
)
 
(2,909
)
Total Retirement Plan Investments (excluding 401(h) Investments)
$
875,910

 
$
223,538

 
$
606,276

 
$
46,096

Miscellaneous Accruals, Interest Receivables, and Non-Interest Cash
(6,119
)
 
 
 
 
 
 
Total Retirement Plan Assets
$
869,791

 
 
 
 
 
 
 
 
Total Fair Value
Amounts at
September 30, 2013
 
Level 1
 
Level 2
 
Level 3
Retirement Plan Investments
 
 
 
 
 
 
 
Domestic Equities(1)
$
402,107

 
$
271,071

 
$
131,036

 
$
—

International Equities(2)
103,028

 
2,355

 
100,673

 
—

Global Equities(3)
25,325

 
—

 
25,325

 
—

Domestic Fixed Income(4)
163,750

 
71,185

 
92,565

 
—

International Fixed Income(5)
2,762

 
1,318

 
1,444

 
—

Global Fixed Income(6)
88,084

 
—

 
88,084

 
—

Hedge Fund Investments
42,027

 
—

 
—

 
42,027

Real Estate
2,723

 
—

 
—

 
2,723

Cash and Cash Equivalents
22,694

 
—

 
22,694

 
—

Total Retirement Plan Investments
852,500

 
345,929

 
461,821

 
44,750

401(h) Investments
(49,453
)
 
(20,141
)
 
(26,706
)
 
(2,606
)
Total Retirement Plan Investments (excluding 401(h) Investments)
$
803,047

 
$
325,788

 
$
435,115

 
$
42,144

Miscellaneous Accruals, Interest Receivables, and Non-Interest Cash
(3,740
)
 
 
 
 
 
 
Total Retirement Plan Assets
$
799,307

 
 
 
 
 
 
 
(1)
Domestic Equities include mostly collective trust funds, common stock, and exchange traded funds.
(2)
International Equities include mostly collective trust funds and common stock.
(3)
Global Equities are comprised of a collective trust fund.
(4)
Domestic Fixed Income securities include mostly collective trust funds, corporate/government bonds and mortgages, and exchange traded funds.
(5)
International Fixed Income securities include mostly collective trust funds and exchange traded funds.
(6)
Global Fixed Income securities are comprised of a collective trust fund.
Schedule Of Significant Unobservable Input Changes In Plan Assets
 
 
Retirement Plan Level 3 Assets
(Thousands)
 
 
Hedge
Funds
 
Real
Estate
 
Excluding
401(h)
Investments
 
Total
 
 
 
Balance at September 30, 2012
$
39,956

 
$
6,170

 
$
(2,680
)
 
$
43,446

 
Realized Gains/(Losses)
—

 
(73
)
 
4

 
(69
)
 
Unrealized Gains/(Losses)
2,071

 
515

 
(156
)
 
2,430

 
Purchases
—

 
188

 
(11
)
 
177

 
Sales
—

 
(4,077
)
 
237

 
(3,840
)
 
Balance at September 30, 2013
42,027

 
2,723


(2,606
)

42,144

 
Realized Gains/(Losses)
—

 
62

 
(4
)
 
58

 
Unrealized Gains/(Losses)
3,186

 
(10
)
 
(239
)
 
2,937

 
Purchases
—

 
1,111

 
(65
)
 
1,046

 
Sales
—

 
(94
)
 
5

 
(89
)
 
Balance at September 30, 2014
$
45,213

 
$
3,792

 
$
(2,909
)
 
$
46,096