Regulatory Assets and Liabilities Regulatory Assets and Liabilities (Tables)

12 Months Ended

Sep. 30, 2015

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



Regulatory Assets and Liabilities At September 30
	2015		2014
Current regulatory assets
Deferred nuclear generating units	$	237	$	237
Unrealized losses on commodity derivatives	162		134
Environmental agreements	47		54
Environmental cleanup costs – Kingston ash spill	43		47
Fuel cost adjustment receivable	15		9
Other current regulatory assets	2		—
Total current regulatory assets	506		481

Non-current regulatory assets
Deferred pension costs and other post-retirement benefits costs	5,565		4,297
Unrealized losses on interest rate derivatives	1,236		957
Nuclear decommissioning costs	1,003		931
Environmental cleanup costs - Kingston ash spill	348		421
Non-nuclear decommissioning costs	828		645
Deferred nuclear generating units	1,042		1,255
Environmental agreements	55		108
Unrealized losses on commodity derivatives	63		72
Other non-current regulatory assets	278		308
Total non-current regulatory assets	10,418		8,994
Total regulatory assets	$	10,924	$	9,475

Current regulatory liabilities
Fuel cost adjustment tax equivalents	$	164	$	182
Unrealized gains on commodity derivatives	—		2
Total current regulatory liabilities	164		184
Non-current regulatory liabilities
Unrealized gains on commodity derivatives	2		—
Total non-current regulatory liabilities	2		—
Total regulatory liabilities	$	166	$	184