other income (Tables)

6 Months Ended

Jun. 30, 2022

other income

Schedule of other income

		Three months				Six months
Periods ended June 30 (millions)	Note	2022		2021		2022		2021
Government assistance		$	—	$	2	$	2	$	5
Other sublet revenue	19		2		1		3		2
Investment income (loss), gain (loss) on disposal of assets and other			3		(2)		(1)		(5)
Interest income	21(b)		—		1		1		2
Changes in business combination-related provisions			23		—		49		—
		$	28	$	2	$	54	$	4