Interest expense (Tables)

12 Months Ended

Dec. 31, 2017

Borrowing costs [abstract]

Disclosure of interest expense

FOR THE YEAR ENDED DECEMBER 31	2017		2016
Interest expense on long-term debt	(898	)	(852	)
Interest expense on other debt	(101	)	(86	)
Capitalized interest	44		50
Total interest expense	(955	)	(888	)