Trade and other receivables (Tables)

12 Months Ended

Dec. 31, 2017

Subclassifications of assets, liabilities and equities [abstract]

Schedule of trade and other receivables

FOR THE YEAR ENDED DECEMBER 31	NOTE	2017		2016
Trade receivables(1)		3,138		2,967
Allowance for doubtful accounts	24	(55	)	(60	)
Allowance for revenue adjustments		(80	)	(85	)
Current tax receivable		31		35
Other accounts receivable		101		122
Total trade and other receivables		3,135		2,979

(1) The details of securitized trade receivables are set out in Note 19, Debt due within one year.