Share-Based Compensation (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share based compensation expense	$ 13.1	$ 15.5	$ 53.9	$ 58.1
Share based compensation expense, net of tax	8.1	9.6	33.3	35.9
Percentage Of Awards Applied To Performance Condition			50.00%
Percentage of Awards Applied to Market Condition			50.00%
Number Of Shares To Companys Maximum Award Level For Eligible Employees (in millions)	500,000		500,000
Stock options and Restricted Stock Units (RSUs) [Member]
Vesting period, in years			3 years
Stock Appreciation Rights (SARs) [Member]
Vesting period, in years			10 years
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	66,440		66,440
Employee Stock Option [Member]
Share based compensation expense	$ 3.3	$ 4.3	$ 13.3	$ 17.5
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures			375,273	575,176
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures			1,160,057	1,338,402
Allegion [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures				82,833
Allegion [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures				139,649