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Cash flows (Tables)
 3 Months Ended
Mar. 31, 2017
Supplemental Cash Flow Elements [Abstract]  
Schedule of supplemental disclosures of cash and noncash activity
Three months ended March 31
 
2017
 
2016
(in millions)
 
 
 
 
Supplemental disclosures of cash flow information
 
 

 
 

HEI consolidated
 
 
 
 
Interest paid to non-affiliates
 
$
19

 
$
20

Income taxes paid (including refundable credits)
 
4

 
1

Income taxes refunded (including refundable credits)
 
—

 
45

Hawaiian Electric consolidated
 
 
 
 
Interest paid to non-affiliates
 
13

 
12

Income taxes paid (including refundable credits)
 
2

 
—

Income taxes refunded (including refundable credits)
 
—

 
20

Supplemental disclosures of noncash activities
 
 

 
 

HEI consolidated
 
 
 
 
Common stock dividends reinvested in HEI common stock (financing)1
 
—

 
6

Loans transferred from held for investment to held for sale (investing)
 
9

 
—

Common stock issued (gross) for director and executive/management compensation (financing)2
 
9

 
6

Obligations to fund low income housing investments (operating)
 
1

 
—

HEI consolidated and Hawaiian Electric consolidated
 
 
 
 
Electric utility property, plant and equipment
 
 
 
 
AFUDC-equity (operating)
 
2

 
2

Estimated fair value of noncash contributions in aid of construction (investing)
 
—

 
1

Change in unpaid invoices and accruals (investing)
 
(52
)
 
(48
)

1 The amounts shown represent common stock dividends reinvested in HEI common stock under the HEI Dividend Reinvestment and Stock Purchase Plan (DRIP) in noncash transactions.
2 The amounts shown represent the market value of common stock issued for director and executive/management compensation and withheld to satisfy statutory tax liabilities.