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Other comprehensive income information
 12 Months Ended
Dec. 31, 2014
Other comprehensive income information

17. Other comprehensive income information

Changes in accumulated other comprehensive income:

 

millions of dollars

 2014  2013  2012   

Balance as at January 1

 (1,721) (2,455) (2,238)  

Post-retirement benefits liability adjustment:

Current period change excluding amounts reclassified from accumulated other comprehensive income

 (483) 529  (415)  

Amounts reclassified from accumulated other comprehensive income

 145  205  198   

Balance as at December 31

 (2,059) (1,721) (2,455)  

Amounts reclassified out of accumulated other comprehensive income – before tax income/(expense)

 

millions of dollars

 2014  2013  2012   

Amortization of post-retirement benefits liability adjustment included in net periodic benefit cost (a)

 (196) (276) (266)  
  (a) This accumulated other comprehensive income component is included in the computation of net periodic benefit cost (note 4).

Income tax expense/(credit) for components of other comprehensive income

 

millions of dollars

 2014  2013  2012   

Post-retirement benefits adjustments:

Post-retirement benefits liability adjustment (excluding amortization)

 (169) 185  (155)  

Amortization of post-retirement benefits liability adjustment included in net periodic benefit cost

 51  71  68   

Total

 (118) 256  (87)