Regulatory Assets and Liabilities (Tables)

6 Months Ended

Mar. 31, 2013

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



Regulatory Assets and Liabilities
	At March 31, 2013		At September 30, 2012
Current regulatory assets
Deferred nuclear generating units	$	236	$	237
Unrealized losses on commodity derivatives	174		310
Environmental agreements	89		87
Environmental cleanup costs - Kingston ash spill	72		72
Fuel cost adjustment receivable	13		68
Total current regulatory assets	584		774

Non-current regulatory assets
Deferred pension costs and other post-retirement benefits costs	5,331		5,517
Unrealized losses on interest rate derivatives	1,119		1,332
Nuclear decommissioning costs	890		914
Environmental cleanup costs - Kingston ash spill	756		797
Construction costs	619		619
Non-nuclear decommissioning costs	556		550
Deferred nuclear generating units	354		473
Environmental agreements	226		237
Unrealized losses on commodity derivatives	157		335
Other non-current regulatory assets	344		353
Total non-current regulatory assets	10,352		11,127
Total regulatory assets	$	10,936	$	11,901

Current regulatory liabilities
Fuel cost adjustment tax equivalents	$	177	$	173
Unrealized gains on commodity derivatives	11		18
Total current regulatory liabilities	188		191

Non-current regulatory liabilities
Unrealized gains on commodity derivatives	3		109
Total non-current regulatory liabilities	3		109
Total regulatory liabilities	$	191	$	300