Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Long-term Purchase Commitment [Table Text Block]

As of March 31, 2019, minimum purchase obligations are approximately:

	CenterPoint Energy		CERC
	(in millions)
Remaining nine months of 2019	$	427	$	282
2020	620		420
2021	531		351
2022	406		232
2023	308		155
2024	328		231
2025 and beyond	1,445		1,083