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Derivative Instruments (Tables)
 12 Months Ended
Dec. 31, 2017
Derivative Instruments [Abstract]  
Summary of derivative instruments



 

 

 

 

 



2017

 

2016

Notional amount

$

 2,185 

 

$

 2,280 

Weighted average pay rate on interest-rate swaps

 

 3.75% 

 

 

 3.74% 

Weighted average receive rate on interest-rate swaps

 

 1.52% 

 

 

 0.75% 

Weighted average maturity (years)

 

 2.1 

 

 

 3.1 

Fair value of interest-rate swaps

$

 (56)

 

$

 (122)

Fair value of yield maintenance provisions

$

 56 

 

$

 122