Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2022

Property, plant and equipment [abstract]

Property, Plant and Equipment

(CAD$ in millions)	Exploration and Evaluation		Mineral Properties		Land, Buildings, Plant and Equipment		Capitalized Production Stripping Costs		Construction In Progress		Total
At December 31, 2020
Cost	$	903	$	20,758	$	16,722	$	6,598	$	7,919	$	52,900
Accumulated depreciation	—		(6,223)		(9,145)		(3,954)		—		(19,322)
Net book value	$	903	$	14,535	$	7,577	$	2,644	$	7,919	$	33,578
Year ended December 31, 2021
Opening net book value	$	903	$	14,535	$	7,577	$	2,644	$	7,919	$	33,578
Additions	45		—		181		740		3,877		4,843
Disposals	—		—		(6)		—		(18)		(24)
Impairment reversal	—		215		—		—		—		215
Depreciation and amortization	—		(373)		(802)		(694)		—		(1,869)
Transfers between classifications	—		(50)		2,162		—		(2,112)		—
Decommissioning and restoration    provisions change in estimate	—		250		39		—		—		289
Capitalized borrowing costs	—		115		—		—		255		370
Changes in foreign exchange    rates	(4)		(11)		(13)		(2)		10		(20)
Closing net book value	$	944	$	14,681	$	9,138	$	2,688	$	9,931	$	37,382
At December 31, 2021
Cost	$	944	$	21,362	$	18,716	$	7,334	$	9,931	$	58,287
Accumulated depreciation	—		(6,681)		(9,578)		(4,646)		—		(20,905)
Net book value	$	944	$	14,681	$	9,138	$	2,688	$	9,931	$	37,382
Year ended December 31, 2022
Opening net book value	$	944	$	14,681	$	9,138	$	2,688	$	9,931	$	37,382
Additions	102		—		389		1,138		4,964		6,593
Disposals	—		—		(25)		—		(5)		(30)
Asset impairment	(37)		(247)		(959)		—		—		(1,243)
Depreciation and amortization	—		(325)		(906)		(630)		—		(1,861)
Transfers between classifications	—		104		1,420		—		(1,524)		—
Decommissioning and restoration provisions change in estimate	—		(743)		(145)		—		—		(888)
Capitalized borrowing costs	—		131		—		—		358		489
Transfers to assets held for sale	(142)		(546)		(735)		—		(129)		(1,552)
Changes in foreign exchange rates	28		235		172		52		718		1,205
Closing net book value	$	895	$	13,290	$	8,349	$	3,248	$	14,313	$	40,095
At December 31, 2022
Cost	$	895	$	20,364	$	18,567	$	8,596	$	14,313	$	62,735
Accumulated depreciation	—		(7,074)		(10,218)		(5,348)		—		(22,640)
Net book value	$	895	$	13,290	$	8,349	$	3,248	$	14,313	$	40,095