financing costs (Tables)

12 Months Ended

Dec. 31, 2019

financing costs

Schedule of financing costs

Years ended December 31 (millions)	Note	2019		2018
Interest expense
Interest on long-term debt, excluding lease liabilities - gross		$	634	$	598
Interest on long-term debt, excluding lease liabilities - capitalized 1	18(a)		(23)		—
Interest on long-term debt, excluding lease liabilities			611		598
Interest on lease liabilities	19		67		—
Interest on short-term borrowings and other			8		6
Interest accretion on provisions	25		22		21
Long-term debt prepayment premium	26(a)		28		34
			736		659
Employee defined benefit plans net interest	15		1		17
Foreign exchange			3		(6)
			740		670
Interest income			(7)		(9)
		$	733	$	661

(1) Interest on long-term debt, excluding lease liabilities, at a composite rate of 4.33% was capitalized to intangible assets with indefinite lives in the period.