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other operating income (Tables)
 6 Months Ended
Jun. 30, 2018
other operating income  
Schedule of other operating income

 

 

 

 

 

Three months

 

Six months

 

Periods ended June 30 (millions)

 

Note

 

2018

 

2017

 

2018

 

2017

 

Government assistance, including deferral account amortization

 

 

 

$
6

 

$
7

 

$
12

 

$
14

 

Investment income, gain (loss) on disposal of assets and other

 

 

 
7

 
7

 
26

 
13

 

Interest income

 

21(c)

 

—

 

—

 
1

 

—

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

$
13

 

$
14

 

$
39

 

$
27