Unconsolidated variable interest entities (Tables)

12 Months Ended

Dec. 31, 2016

Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]

Schedule of purchases from independent power producers

Purchases from all IPPs were as follows: 

Years ended December 31	2016		2015		2014
(in millions)
AES Hawaii	$	149	$	134	$	145
Kalaeloa	152		187		279
HEP	29		44		51
HPOWER	71		66		66
Puna Geothermal Venture	28		29		45
Hawaiian Commercial & Sugar (HC&S)	1		8		15
Other IPPs	133		126		121
Total IPPs	$	563	$	594	$	722