Regulatory Assets, Liabilities, And Balancing Accounts (Tables)

6 Months Ended

Jun. 30, 2017

Long-Term Regulatory Assets

Long-term regulatory assets and liabilities are comprised of the following:

	Asset Balance at
(in millions)	June 30, 2017			December 31, 2016
Deferred income taxes	$	4,195	$		3,859
Pension benefits		2,467			2,429
Environmental compliance costs		770			778
Utility retained generation		342			364
Price risk management		84			92
Unamortized loss, net of gain, on reacquired debt		69			76
Other		384			353
Total long-term regulatory assets	$	8,311	$		7,951

Long-Term Regulatory Liabilities

	Liability Balance at
(in millions)	June 30, 2017		December 31, 2016
Cost of removal obligations	$	5,342	$	5,060
Recoveries in excess of AROs		661		626
Public purpose programs		554		567
Other		568		552
Total long-term regulatory liabilities	$	7,125	$	6,805

Regulatory Balancing Accounts Receivable

Current regulatory balancing accounts receivable and payable are comprised of the following:

	Receivable
	Balance at
(in millions)	June 30, 2017		December 31, 2016
Electric distribution	$	285	$	132
Electric transmission		212		244
Utility generation		117		48
Gas distribution and transmission		433		541
Energy procurement		-		132
Public purpose programs		129		106
Other		389		297
Total regulatory balancing accounts receivable	$	1,565	$	1,500

Regulatory Balancing Accounts Payable

	Payable
	Balance at
(in millions)	June 30, 2017		December 31, 2016
Electric transmission	$	171	$	99
Gas distribution and transmission		-		48
Energy procurement		86		13
Public purpose programs		376		264
Other		238		221
Total regulatory balancing accounts payable	$	871	$	645