Divestiture - Operating Results of Discontinued Operations (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Discontinued Operations [Line Items]
Net sales	$ 273.5	$ 90.0
Operating profit	34.1	17.9
Earnings from discontinued operations before income tax provision	33.0	18.1
Income tax provision	12.1	7.5
Net earnings from discontinued operations	20.9	10.6
Gain on sale of discontinued operations before income tax provision	210.8
Income tax provision on sale	31.9
Net gain on sale of discontinued operations	$ 178.9