XML 86 R52.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2018

Text block [abstract]

Summary of 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, 2016
Cost		$	1,613			$	18,667			$	13,517			$	4,269			$	3,907			$	41,973
Accumulated depreciation			—				(5,105	)			(7,165	)			(2,108	)			—				(14,378	)

Net book value		$	1,613			$	13,562			$	6,352			$	2,161			$	3,907			$	27,595

Year ended December 31, 2017
Opening net book value		$	1,613			$	13,562			$	6,352			$	2,161			$	3,907			$	27,595
Additions			171				174				562				742				1,284				2,933
Disposals			—				—				(67	)			—				—				(67	)
Impairment reversal and (asset impairments) (Note 8)			—				207				(44	)			—				—				163
Depreciation and amortization			—				(368	)			(640	)			(566	)			—				(1,574	)
Transfers between classifications			—				(8	)			104				—				(96	)			—
Decommissioning and restoration provision change in estimate			—				501				24				—				—				525
Capitalized borrowing costs			—				102				—				—				231				333
Reclassification of Waneta Dam to assets held for sale and other			—				40				(394	)			—				—				(354	)
Changes in foreign exchange rates			(10	)			(240	)			(155	)			(39	)			(65	)			(509	)

Closing net book value		$	1,774			$	13,970			$	5,742			$	2,298			$	5,261			$	29,045

At December 31, 2017
Cost		$	1,774			$	19,329			$	12,948			$	4,561			$	5,261			$	43,873
Accumulated depreciation			—				(5,359	)			(7,206	)			(2,263	)			—				(14,828	)

Net book value		$	1,774			$	13,970			$	5,742			$	2,298			$	5,261			$	29,045

Year ended December 31, 2018
Opening net book value		$	1,774			$	13,970			$	5,742			$	2,298			$	5,261			$	29,045
Additions			144				86				710				761				1,135				2,836
Disposals			—				—				(12	)			—				—				(12	)
Asset impairments (Note 8)			(31	)			(6	)			(4	)			—				—				(41	)
Depreciation and amortization			—				(372	)			(595	)			(543	)			—				(1,510	)
Transfers between classifications			—				1,050				3,307				—				(4,357	)			—
Decommissioning and restoration provision change in estimate			—				(250	)			(29	)			—				—				(279	)
Capitalized borrowing costs			—				108				—				—				185				293
Other			—				(2	)			56				—				—				54
Changes in foreign exchange rates			21				290				182				50				121				664

Closing net book value		$	1,908			$	14,874			$	9,357			$	2,566			$	2,345			$	31,050

At December 31, 2018
Cost		$	1,908			$	20,613			$	17,452			$	5,435			$	2,345			$	47,753
Accumulated depreciation			—				(5,739	)			(8,095	)			(2,869	)			—				(16,703	)

Net book value		$	1,908			$	14,874			$	9,357			$	2,566			$	2,345			$	31,050