Regulatory Assets and Liabilities (Tables)

9 Months Ended

Jun. 30, 2015

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



Regulatory Assets and Liabilities
	At June 30, 2015		At September 30, 2014
Current regulatory assets
Deferred nuclear generating units	$	236	$	237
Unrealized losses on commodity derivatives	182		134
Environmental agreements	70		54
Environmental cleanup costs - Kingston ash spill	45		47
Fuel cost adjustment receivable	14		9
Other current regulatory assets	2		—
Total current regulatory assets	549		481

Non-current regulatory assets
Deferred pension costs and other post-retirement benefits costs	4,087		4,297
Deferred pension costs due to actions of regulator	171		—
Unrealized losses on interest rate derivatives	1,028		957
Nuclear decommissioning costs	892		931
Environmental cleanup costs - Kingston ash spill	362		421
Non-nuclear decommissioning costs	720		645
Deferred nuclear generating units	1,097		1,255
Environmental agreements	63		108
Unrealized losses on commodity derivatives	81		72
Other non-current regulatory assets	286		308
Total non-current regulatory assets	8,787		8,994
Total regulatory assets	$	9,336	$	9,475

Current regulatory liabilities
Fuel cost adjustment tax equivalents	$	165	$	182
Unrealized gains on commodity derivatives	3		2
Total current regulatory liabilities	168		184

Non-current regulatory liabilities
Unrealized gains on commodity derivatives	1		—
Total non-current regulatory liabilities	1		—
Total regulatory liabilities	$	169	$	184