Short-term Borrowings and Long-term Debt (Tables)

3 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

Schedule of Line of Credit Facilities [Table Text Block]

Revolving Credit Facility.  As of March 31, 2017 and December 31, 2016, CERC had the following revolving credit facility and utilization of such facility:

		March 31, 2017							December 31, 2016
Size of Facility		Loans		Letters of Credit		Commercial Paper			Loans		Letters of Credit		Commercial Paper
		(in millions)
$	600	$	—	$	—	$	599	(1)	$	—	$	4	$	569	(1)

(1) Weighted average interest rate was approximately 1.27% and 1.03% as of March 31, 2017 and December 31, 2016, respectively.

Execution Date	Size of Facility		Draw Rate of LIBOR plus (1)		Financial Covenant Limit on Debt to Capital Ratio		Debt to Capital Ratio as of March 31, 2017	Termination Date
	(in millions)
March 3, 2016	$	600	1.25	%	65	%	35.8%	March 3, 2021

(1) Based on current credit ratings.