Financing (Income) Expenses (Tables)

12 Months Ended

Dec. 31, 2017

Financing (Income) Expenses

Financing expenses disclosure

($ millions)		2017		2016
Interest on debt and finance leases		945		1 012
Capitalized interest at 5.5% (2016 – 5.7%)		(729	)	(597	)
	Interest expense	216		415
	Interest on partnership liability (note 38)	5		—
	Interest on pension and other post-retirement benefits	58		59
	Accretion	247		269
	Foreign exchange gain on U.S. dollar denominated debt	(771	)	(458	)
	Foreign exchange and other	(52	)	61
	Loss on extinguishment of long-term debt	113		99
	Realized gain on foreign currency hedges	(62	)	—
		(246	)	445