Regulatory Assets, Liabilities, And Balancing Accounts (Tables)

3 Months Ended

Mar. 31, 2017

Long-Term Regulatory Assets

Long-term regulatory assets are comprised of the following:

	Balance at
(in millions)	March 31, 2017			December 31, 2016
Pension benefits	$	2,448	$		2,429
Deferred income taxes		4,049			3,859
Utility retained generation		352			364
Environmental compliance costs		716			778
Price risk management		92			92
Unamortized loss, net of gain, on reacquired debt		72			76
Other		360			353
Total long-term regulatory assets	$	8,089	$		7,951

Long-Term Regulatory Liabilities

Long-term regulatory liabilities are comprised of the following:

	Balance at
(in millions)	March 31, 2017		December 31, 2016
Cost of removal obligations	$	5,186	$	5,060
Recoveries in excess of AROs		682		626
Public purpose programs		546		567
Other		577		552
Total long-term regulatory liabilities	$	6,991	$	6,805

Regulatory Balancing Accounts Receivable

	Receivable
	Balance at
(in millions)	March 31, 2017		December 31, 2016
Electric distribution	$	339	$	132
Electric transmission		235		244
Utility generation		248		48
Gas distribution and transmission		323		541
Energy procurement		7		132
Public purpose programs		116		106
Other		387		297
Total regulatory balancing accounts receivable	$	1,655	$	1,500

Regulatory Balancing Accounts Payable

	Payable
	Balance at
(in millions)	March 31, 2017		December 31, 2016
Electric transmission	$	202	$	99
Gas distribution and transmission		30		48
Energy procurement		102		13
Public purpose programs		334		264
Other		240		221
Total regulatory balancing accounts payable	$	908	$	645