Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2018

Revenue Recognition and Deferred Revenue [Abstract]

Disaggregation of Revenue [Table Text Block]

The following tables disaggregate revenues by major source:

	Three Months Ended March 31, 2018
	Natural Gas Distribution (1)			Energy  Services (2)			Other Operations (2)		Total
	(in millions)
Revenue from contracts	$	1,186		$	178		$	—	$	1,364
Derivatives income	—			1,107			—		1,107
Other (3)	(33		)	—			—		(33		)
Eliminations	(10		)	(28		)	—		(38		)
Total revenues	$	1,143		$	1,257		$	—	$	2,400

	Three Months Ended March 31, 2017
	Natural Gas Distribution (1)			Energy  Services (2)			Other Operations (2)		Total
	(in millions)
Revenue from contracts	$	925		$	142		$	—	$	1,067
Derivatives income	—			1,054			—		1,054
Other (3)	(9		)	—			1		(8		)
Eliminations	(9		)	(11		)	—		(20		)
Total revenues	$	907		$	1,185		$	1	$	2,093

(1) Reflected in Utility revenues in the Condensed Statements of Consolidated Income.

(2) Reflected in Non-utility revenues in the Condensed Statements of Consolidated Income.

(3) Primarily consists of income from ARPs and leases. ARPs are contracts between the utility and its regulators, not between the utility and a customer. CERC recognizes ARP revenue as other revenues when the regulator-specified conditions for recognition have been met. Upon recovery of ARP revenue through incorporation in rates charged for utility service to customers, ARP revenue is reversed and recorded as revenue from contracts with customers. The recognition of ARP revenues and the reversal of ARP revenues upon recovery through rates charged for utility service may not occur in the same period.