Regulatory Assets and Liabilities (Tables)

6 Months Ended

Mar. 31, 2015

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



Regulatory Assets and Liabilities
	At March 31, 2015		At September 30, 2014
Current regulatory assets
Deferred nuclear generating units	$	237	$	237
Unrealized losses on commodity derivatives	213		134
Environmental agreements	63		54
Environmental cleanup costs - Kingston ash spill	45		47
Fuel cost adjustment receivable	70		9
Other current regulatory assets	1		—
Total current regulatory assets	629		481

Non-current regulatory assets
Deferred pension costs and other post-retirement benefits costs	4,158		4,297
Deferred pension costs due to actions of regulator	114		—
Unrealized losses on interest rate derivatives	1,306		957
Nuclear decommissioning costs	882		931
Environmental cleanup costs - Kingston ash spill	365		421
Non-nuclear decommissioning costs	654		645
Deferred nuclear generating units	1,153		1,255
Environmental agreements	79		108
Unrealized losses on commodity derivatives	109		72
Other non-current regulatory assets	293		308
Total non-current regulatory assets	9,113		8,994
Total regulatory assets	$	9,742	$	9,475

Current regulatory liabilities
Fuel cost adjustment tax equivalents	$	170	$	182
Unrealized gains on commodity derivatives	4		2
Total current regulatory liabilities	174		184

Non-current regulatory liabilities
Unrealized gains on commodity derivatives	1		—
Total non-current regulatory liabilities	1		—
Total regulatory liabilities	$	175	$	184