Basis of Preparation and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure Of Significant Accounting Policies [Abstract]

Disclosure of Detailed Information About Property, Plant and Equipment

We recognize depreciation expense on a straight-line basis over the estimated useful life of the asset as follows:

Buildings	25 years
Building/leasehold improvements	Up to 25 years or term of lease
Machinery and equipment	3 to 10 years

Property, plant and equipment are comprised of the following:

	2016
	Cost		Accumulated Depreciation and Impairment		Net Book Value
Land	$	22.9	$	12.0	$	10.9
Buildings including improvements	322.0		181.9		140.1
Machinery and equipment	718.7		567.0		151.7
	$	1,063.6	$	760.9	$	302.7

	2017
	Cost		Accumulated Depreciation and Impairment		Net Book Value
Land	$	23.1	$	12.0	$	11.1
Buildings including improvements	344.0		202.4		141.6
Machinery and equipment	745.5		574.3		171.2
	$	1,112.6	$	788.7	$	323.9

The following table details the changes to the net book value of property, plant and equipment for the years indicated:

	Land		Buildings including Improvements			Machinery and Equipment			Total
Balance — January 1, 2016	$	10.7	$	141.7		$	162.2		$	314.6
Additions	—		21.5			55.7			77.2
Acquisitions through business combinations (note 3)	—		—			1.1			1.1
Depreciation	—		(19.9		)	(46.3		)	(66.2		)
Write down of assets and other disposals (i)	—		(3.4		)	(20.3		)	(23.7		)
Foreign exchange and other	0.2		0.2			(0.7		)	(0.3		)
Balance — December 31, 2016 (ii)	10.9		140.1			151.7			302.7
Additions	—		22.8			72.1			94.9
Depreciation	—		(21.3		)	(46.3		)	(67.6		)
Write down of assets and other disposals (i)	—		(0.2		)	(5.3		)	(5.5		)
Foreign exchange and other	0.2		0.2			(1.0		)	(0.6		)
Balance — December 31, 2017 (ii)	$	11.1	$	141.6		$	171.2		$	323.9

(i) Includes $4.8 of solar panel manufacturing equipment that we reclassified as assets held for sale during 2017. See note 7. In 2016, we recorded impairment losses of $21.2 primarily to write-down solar panel manufacturing equipment. See note 16(a).

(ii) The net book value of property, plant and equipment at December 31, 2017 included $7.3 (December 31, 2016— $8.2) of assets under finance leases. See note 24 for the future minimum lease payments under these finance leases.

Disclosure of Detailed Information About Intangible Assets

We amortize these assets on a straight-line basis over their estimated useful lives as follows:

Intellectual property	3 to 5 years
Other intangible assets	4 to 10 years
Computer software assets	1 to 10 years

Recently Issued Accounting Pronouncements

We currently estimate the following impacts under the new standard:

	January 1			December 31			Year ended
	2016			2016			December 31, 2016
	Increase (decrease)
Accounts receivable/Contract asset	$	197		$	227		$	—
Inventories	(178		)	(206		)	—
Deferred taxes	(2		)	(2		)	—
Deficit	(17		)	(19		)	—
Revenue	—			—			30
Cost of sales	—			—			28
Net earnings	—			—			2