Regulatory Assets and Liabilities (Tables)

3 Months Ended

Dec. 31, 2014

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



Regulatory Assets and Liabilities
	At December 31, 2014		At September 30, 2014
Current regulatory assets
Deferred nuclear generating units	$	237	$	237
Unrealized losses on commodity derivatives	205		134
Environmental agreements	62		54
Environmental cleanup costs - Kingston ash spill	45		47
Fuel cost adjustment receivable	15		9
Total current regulatory assets	564		481

Non-current regulatory assets
Deferred pension costs and other post-retirement benefits costs	4,235		4,297
Deferred pension costs due to actions of regulator	51		—
Unrealized losses on interest rate derivatives	1,141		957
Nuclear decommissioning costs	908		931
Environmental cleanup costs - Kingston ash spill	360		421
Non-nuclear decommissioning costs	651		645
Deferred nuclear generating units	1,209		1,255
Environmental agreements	91		108
Unrealized losses on commodity derivatives	97		72
Other non-current regulatory assets	300		308
Total non-current regulatory assets	9,043		8,994
Total regulatory assets	$	9,607	$	9,475

Current regulatory liabilities
Fuel cost adjustment tax equivalents	$	174	$	182
Unrealized gains on commodity derivatives	—		2
Total current regulatory liabilities	174		184
Total regulatory liabilities	$	174	$	184