Discontinued Operations (Summary of Financial Information for Discontinued Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Net revenues	$ 0		$ 473.3
Pre-tax earnings (loss) from operations	1.4		55.0
Pre-tax gain (loss) on sale	0		0
Tax benefit (expense)	1.5		(15.8)
Discontinued operations, net of tax	$ 2.9	[1]	$ 39.2	[1]	$ 13.3

[1] Included in Allegion, net of tax for the three months ended March 31, 2013 are spin costs of