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Other Income and Expense (Tables)
 12 Months Ended
Dec. 31, 2017
Other Income and Expenses [Abstract]  
Components of Other Income
The components are summarized as follows (in millions):
Year Ended December 31,
2017
 
2016
 
2015
Legal settlements (1)
$
60

 
$
—

 
$
—

Allowance for funds used during construction (US Utilities)
26

 
29

 
17

Gain on sale of assets
1

 
4

 
17

Contract termination
—

 
—

 
20

Other
33

 
31

 
30

Total other income
$
120

 
$
64

 
$
84
Components of Other Expense
The components are summarized as follows (in millions):
Year Ended December 31,
2017
 
2016
 
2015
Allowance for other receivables (1)
$
—

 
$
52

 
$
—

Loss on sale and disposal of assets
28

 
12

 
—

Water rights write-off
19

 
6

 
10

Other
10

 
9

 
14

Total other expense
$
57

 
$
79

 
$
24


 _____________________________
(1) 
During the fourth quarter of 2016, we recognized a full allowance on a non-trade receivable in the MCAC SBU as a result of payment delays and discussions with the counterparty. The allowance relates to certain reimbursements the Company was expecting in connection with a legal matter. Management believes the counterparty is obligated to pay and plans to continue to attempt to fully collect the non-trade receivable.