other long-term assets (Tables)

6 Months Ended

Jun. 30, 2020

other long-term assets

Schedule of other long-term assets

		June 30,		December 31,
As at (millions)	Note	2020		2019
Pension assets		$	1	$	155
Unbilled customer finance receivables	4(a)		319		225
Derivative assets	4(d)		413		76
Costs incurred to obtain or fulfill a contract with a customer			100		109
Real estate joint venture advances	21(b)		114		104
Investment in real estate joint venture	21(b)		2		3
Investment in associate	21		72		—
Portfolio investments 1			122		110
Prepaid maintenance			61		55
Other			151		82
		$	1,355	$	919

(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

	Three months						Six months
	Costs incurred to						Costs incurred to
	Obtain						Obtain
	contracts with		Fulfill contracts				contracts with			Fulfill contracts
Periods ended June 30, 2020 (millions)	customers		with customers		Total		customers			with customers		Total
Balance, beginning of period	$	331	$	14	$	345	$	344	$		14	$	358
Additions		54		1		55		113			2		115
Amortization		(71)		(1)		(72)		(143)			(2)		(145)
Balance, end of period	$	314	$	14	$	328	$	314		$	14	$	328
Current 1							$	221		$	7	$	228
Non-current								93			7		100
							$	314		$	14	$	328

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