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Earnings Per Share - Computation of Basic and Diluted Net EPS (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Net earnings attributable to controlling interests	$ 55.7	$ 46.5
Weighted average number of common shares outstanding	178.9	177.0
Dilutive effect of stock options using the treasury stock method	1.7	0.6
Weighted average number of common and common equivalent shares outstanding	180.6	177.6
Basic net earnings per share	$ 0.31	$ 0.26
Diluted net earnings per share	$ 0.31	$ 0.26

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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