Regulatory Assets and Liabilities (Tables)

3 Months Ended

Dec. 31, 2015

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



Regulatory Assets and Liabilities
	At December 31, 2015		At September 30, 2015
Current regulatory assets
Deferred nuclear generating units	$	237	$	237
Unrealized losses on commodity derivatives	169		162
Environmental agreements	49		47
Environmental cleanup costs - Kingston ash spill	43		43
Fuel cost adjustment receivable	3		15
Other current regulatory assets	2		2
Total current regulatory assets	503		506

Non-current regulatory assets
Deferred pension costs and other post-retirement benefits costs	5,556		5,565
Unrealized losses on interest rate derivatives	1,147		1,236
Nuclear decommissioning costs	970		1,003
Environmental cleanup costs - Kingston ash spill	331		348
Non-nuclear decommissioning costs	835		828
Deferred nuclear generating units	1,004		1,042
Environmental agreements	41		55
Unrealized losses on commodity derivatives	81		63
Other non-current regulatory assets	272		278
Total non-current regulatory assets	10,237		10,418
Total regulatory assets	$	10,740	$	10,924

Current regulatory liabilities
Fuel cost adjustment tax equivalents	$	157	$	164
Fuel cost adjustment payable	25		—
Total current regulatory liabilities	182		164

Non-current regulatory liabilities
Unrealized gains on commodity derivatives	4		2
Total non-current regulatory liabilities	4		2
Total regulatory liabilities	$	186	$	166