other comprehensive income (Tables)

12 Months Ended

Dec. 31, 2021

other comprehensive income

Schedule of other comprehensive income

																	Item never				Item never
																	reclassified to				reclassified to
	Items that may subsequently be reclassified to income																income				income
	Change in unrealized fair value of derivatives designated as cash flow hedges in current period (Note 4(i))
	Derivatives used to manage currency risk						Derivatives used to manage other market risks								Cumulative		Change in
			Prior period						Prior period						foreign		measurement				Employee
	Gains		(gains) losses				Gains		(gains) losses						currency		of investment		Accumulated		defined benefit
	(losses)		transferred to				(losses)		transferred to						translation		financial		other		plan		Other
Years ended December 31 (millions)	arising		net income		Total		arising		net income		Total		Total		adjustment		assets		comp. income		re-measure-ments		comp. income
Accumulated balance as at January 1, 2020					$	66					$	(1)	$	65	$	42	$	12	$	119
Other comprehensive income (loss)
Amount arising	$	(117)	$	(3)		(120)	$	(6)	$	(1)		(7)		(127)		113		17		3	$	(421)	$	(418)
Income taxes	$	(5)	$	(9)		(14)	$	(2)	$	—		(2)		(16)		—		3		(13)		(109)		(122)
Net						(106)						(5)		(111)		113		14		16	$	(312)	$	(296)
Accumulated balance as at December 31, 2020						(40)						(6)		(46)		155		26		135
Other comprehensive income (loss)
Amount arising	$	73	$	75		148	$	—	$	4		4		152		(130)		66		88	$	809	$	897
Income taxes	$	9	$	18		27	$	—	$	1		1		28		—		9		37		209		246
Net						121						3		124		(130)		57		51	$	600	$	651
Accumulated balance as at December 31, 2021					$	81					$	(3)	$	78	$	25	$	83	$	186
Attributable to:
Common Shares																			$	203
Non-controlling interests																				(17)
																			$	186