Regulatory Assets and Liabilities (Tables)

9 Months Ended

Jun. 30, 2014

Components of regulatory assets and regulatory liabilities are summarized in the table below:



Regulatory Assets and Liabilities
	At June 30, 2014		At September 30, 2013
Current regulatory assets
Deferred nuclear generating units	$	237	$	237
Unrealized losses on commodity derivatives	137		183
Environmental agreements	77		73
Environmental cleanup costs - Kingston ash spill	53		68
Fuel cost adjustment receivable	62		—
Total current regulatory assets	566		561

Non-current regulatory assets
Deferred pension costs and other post-retirement benefits costs	3,875		4,076
Unrealized losses on interest rate derivatives	898		808
Nuclear decommissioning costs	898		893
Environmental cleanup costs - Kingston ash spill	449		681
Non-nuclear decommissioning costs	577		571
Deferred nuclear generating units	1,308		1,438
Environmental agreements	139		189
Unrealized losses on commodity derivatives	112		139
Other non-current regulatory assets	310		336
Total non-current regulatory assets	8,566		9,131
Total regulatory assets	$	9,132	$	9,692

Current regulatory liabilities
Fuel cost adjustment tax equivalents	$	177	$	176
Fuel cost adjustment liability	—		29
Unrealized gains on commodity derivatives	4		7
Total current regulatory liabilities	181		212

Non-current regulatory liabilities
Unrealized gains on commodity derivatives	2		1
Total non-current regulatory liabilities	2		1
Total regulatory liabilities	$	183	$	213