Condensed Consolidated Statements of Earnings and Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net earnings from discontinued operations, tax expense (benefit)	$ (0.1)	$ 1.5
Gain (Loss) from disposal of discontinued business, tax (benefit)		$ (0.4)

Amount of tax expense (benefit) on gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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