Regulatory Assets and Liabilities Regulatory Assets and Liabilities (Tables)

12 Months Ended

Sep. 30, 2016

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



Regulatory Assets and Liabilities At September 30
	2016		2015
Current regulatory assets
Deferred nuclear generating units	$	237	$	237
Unrealized losses on commodity derivatives	122		162
Environmental agreements	34		47
Environmental cleanup costs – Kingston ash spill	42		43
Fuel cost adjustment receivable	98		15
Other current regulatory assets	3		2
Total current regulatory assets	536		506

Non-current regulatory assets
Deferred pension costs and other post-retirement benefits costs	5,385		5,565
Unrealized losses on interest rate derivatives	1,547		1,236
Nuclear decommissioning costs	938		1,003
Environmental cleanup costs - Kingston ash spill	299		348
Non-nuclear decommissioning costs	819		828
Deferred nuclear generating units	850		1,042
Environmental agreements	18		55
Unrealized losses on commodity derivatives	56		63
Other non-current regulatory assets	252		278
Total non-current regulatory assets	10,164		10,418
Total regulatory assets	$	10,700	$	10,924

Current regulatory liabilities
Fuel cost adjustment tax equivalents	$	148	$	164
Unrealized gains on commodity derivatives	6		—
Total current regulatory liabilities	154		164
Non-current regulatory liabilities
Unrealized gains on commodity derivatives	3		2
Total non-current regulatory liabilities	3		2
Total regulatory liabilities	$	157	$	166