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Summary of Significant Accounting Policies (Table)
12 Months Ended
Sep. 30, 2018
Accounting Policies [Abstract]  
Schedule of Regulatory Assets
Significant regulatory assets and liabilities as of September 30, 2018 and 2017 included the following:
 
September 30
 
2018
 
2017
 
(In thousands)
Regulatory assets:
 
 
 
Pension and postretirement benefit costs(1)
$
6,496

 
$
26,826

Infrastructure mechanisms(2)
96,739

 
46,437

Deferred gas costs
1,927

 
65,714

Recoverable loss on reacquired debt
8,702

 
11,208

Deferred pipeline record collection costs
20,467

 
11,692

APT annual adjustment mechanism

 
2,160

Rate case costs
2,741

 
2,629

Other
6,739

 
10,132

 
$
143,811

 
$
176,798

Regulatory liabilities:
 
 
 
Regulatory excess deferred taxes(3)
$
744,895

 
$

Regulatory cost of service reserve(4)
22,508

 

Regulatory cost of removal obligation
522,175

 
521,330

Deferred gas costs
94,705

 
15,559

Asset retirement obligation
12,887

 
12,827

APT annual adjustment mechanism
35,228

 

Pension and postretirement benefit costs
69,113

 

Other
9,486

 
5,941

 
$
1,510,997

 
$
555,657



(1)
Includes $6.5 million and $9.4 million of pension and postretirement expense deferred pursuant to regulatory authorization.
(2)
Infrastructure mechanisms in Texas and Louisiana allow for the deferral of all eligible expenses associated with capital expenditures incurred pursuant to these rules, including the recording of interest on the deferred expenses until the next rate proceeding (rate case or annual rate filing), at which time investment and costs would be recovered through base rates.
(3)
The TCJA resulted in the remeasurement of the net deferred tax liability included in our rate base. Of this amount, $5.2 million is recorded in other current liabilities. The period and timing of the return of the excess deferred taxes is being determined by regulators in each of our jurisdictions. See Note 12 for further information.
(4)
Effective January 1, 2018, regulators in each of our service areas required us to establish a regulatory liability for the difference in recoverable federal taxes included in revenues based on the former 35% federal statutory rate and the new 21% federal statutory rate for service provided on or after January 1, 2018. The period and timing of the return of this liability to utility customers is being determined by regulators in each of our jurisdictions. See Note 12 for further information.
Schedule of Regulatory Liabilities
Significant regulatory assets and liabilities as of September 30, 2018 and 2017 included the following:
 
September 30
 
2018
 
2017
 
(In thousands)
Regulatory assets:
 
 
 
Pension and postretirement benefit costs(1)
$
6,496

 
$
26,826

Infrastructure mechanisms(2)
96,739

 
46,437

Deferred gas costs
1,927

 
65,714

Recoverable loss on reacquired debt
8,702

 
11,208

Deferred pipeline record collection costs
20,467

 
11,692

APT annual adjustment mechanism

 
2,160

Rate case costs
2,741

 
2,629

Other
6,739

 
10,132

 
$
143,811

 
$
176,798

Regulatory liabilities:
 
 
 
Regulatory excess deferred taxes(3)
$
744,895

 
$

Regulatory cost of service reserve(4)
22,508

 

Regulatory cost of removal obligation
522,175

 
521,330

Deferred gas costs
94,705

 
15,559

Asset retirement obligation
12,887

 
12,827

APT annual adjustment mechanism
35,228

 

Pension and postretirement benefit costs
69,113

 

Other
9,486

 
5,941

 
$
1,510,997

 
$
555,657



(1)
Includes $6.5 million and $9.4 million of pension and postretirement expense deferred pursuant to regulatory authorization.
(2)
Infrastructure mechanisms in Texas and Louisiana allow for the deferral of all eligible expenses associated with capital expenditures incurred pursuant to these rules, including the recording of interest on the deferred expenses until the next rate proceeding (rate case or annual rate filing), at which time investment and costs would be recovered through base rates.
(3)
The TCJA resulted in the remeasurement of the net deferred tax liability included in our rate base. Of this amount, $5.2 million is recorded in other current liabilities. The period and timing of the return of the excess deferred taxes is being determined by regulators in each of our jurisdictions. See Note 12 for further information.
(4)
Effective January 1, 2018, regulators in each of our service areas required us to establish a regulatory liability for the difference in recoverable federal taxes included in revenues based on the former 35% federal statutory rate and the new 21% federal statutory rate for service provided on or after January 1, 2018. The period and timing of the return of this liability to utility customers is being determined by regulators in each of our jurisdictions. See Note 12 for further information.