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Supplemental Cash Flow Information
6 Months Ended
Jun. 30, 2018
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information
(8) Supplemental Cash Flow Information

Cash flows related to income taxes, interest, construction in process and dividends were as follows:
 
Six Months Ended
June 30,
 
2018
 
2017
 
(in millions)
Supplemental disclosures:
 
Cash paid for income taxes, net of refunds
$
8

 
$
10

Cash paid for interest
52

 
53

Non-cash investing and financing activities:
 
 
 
Construction in progress additions included in accounts payable
$
8

 
$
9

Change in accounts payable related to construction in progress additions

 
(7
)
Landlord incentives for leasehold improvements

 
1

Dividend accrual
65