Regulatory Assets and Liabilities (Tables)

9 Months Ended

Jun. 30, 2016

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



Regulatory Assets and Liabilities
	At June 30, 2016		At September 30, 2015
Current regulatory assets
Deferred nuclear generating units	$	237	$	237
Unrealized losses on commodity derivatives	160		162
Fuel cost adjustment receivable	119		15
Environmental agreements	43		47
Environmental cleanup costs - Kingston ash spill	43		43
Other current regulatory assets	2		2
Total current regulatory assets	604		506

Non-current regulatory assets
Deferred pension costs and other post-retirement benefits costs	5,541		5,565
Unrealized losses on interest rate derivatives	1,521		1,236
Nuclear decommissioning costs	972		1,003
Deferred nuclear generating units	901		1,042
Non-nuclear decommissioning costs	810		828
Environmental cleanup costs - Kingston ash spill	309		348
Unrealized losses on commodity derivatives	87		63
Environmental agreements	25		55
Other non-current regulatory assets	258		278
Total non-current regulatory assets	10,424		10,418
Total regulatory assets	$	11,028	$	10,924

Current regulatory liabilities
Fuel cost adjustment tax equivalents	$	141	$	164
Unrealized gains on commodity derivatives	8		—
Total current regulatory liabilities	149		164

Non-current regulatory liabilities
Unrealized gains on commodity derivatives	4		2
Total non-current regulatory liabilities	4		2
Total regulatory liabilities	$	153	$	166