other long-term assets (Tables)

12 Months Ended

Dec. 31, 2019

other long-term assets

Schedule of other long-term assets

As at December 31 (millions)	Note	2019		2018
Pension assets	15(b)	$	155	$	503
Unbilled customer finance receivables	4(b)		225		47
Derivative assets	4(h)		76		54
Costs incurred to obtain or fulfill a contract with a customer			109		110
Real estate joint venture advances	21(b)		104		69
Investment in real estate joint ventures	21(b)		3		5
Portfolio investments 1			110		70
Prepaid maintenance			55		55
Other			82		73
		$	919	$	986

(1) Fair value measured at reporting date using significant other observable inputs (Level 2).

Schedule of costs incurred to obtain and fulfill contracts with customers

	2019						2018
	Costs incurred to						Costs incurred to
	Obtain						Obtain
	contracts with		Fulfill contracts				contracts with		Fulfill contracts
Years ended December 31 (millions)	customers		with customers		Total		customers		with customers		Total
Balance, beginning of period	$	356	$	15	$	371	$	329	$	11	$	340
Additions		288		4		292		313		8		321
Amortization		(300)		(5)		(305)		(286)		(4)		(290)
Balance, end of period	$	344	$	14	$	358	$	356	$	15	$	371
Current 1	$	243	$	6	$	249	$	256	$	5	$	261
Non-current		101		8		109		100		10		110
	$	344	$	14	$	358	$	356	$	15	$	371

(1) Presented on the Consolidated statements of financial position in prepaid expenses.