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Derivative Instruments (Tables)
 12 Months Ended
Dec. 31, 2018
Notes to Consolidated Financial Statements [Abstract]  
Derivative instruments

 

As at December 31, 2018

As at December 31, 2017

 

Assets

Liabilities

Assets

Liabilities

 

$ millions

$ millions

 

 

 

 

 

 

Included in current assets and liabilities:

 

 

 

 

Foreign currency and interest derivative instruments

13

(16)

1

(3)

Derivative instruments on energy and marine transport

-

(5)

4

-

 

 

 

 

 

 

13

(21)

5

(3)

 

 

 

 

 

Included in non-current assets and liabilities:

 

 

 

 

Foreign currency and interest derivative instruments

15

-

64

(3)