Pensions and Postretirement Benefits Other than Pensions (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended			3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013 Allegion [Member]	Dec. 31, 2013 Allegion [Member] Pension Plan, Defined Benefit [Member]	Dec. 31, 2013 Other Postretirement Benefit Plan, Defined Benefit [Member] Allegion [Member]	Mar. 31, 2014 Pension Plan, Defined Benefit [Member]
Increase (Decrease) in Pension Plan Obligations			$ 631.1
Defined Benefit Plan, Divestitures, Plan Assets			543.5
Company contributions	11.4	6.8
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year						130.8
Increase (Decrease) in Postretirement Obligations					14.1
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	$ (4.6)	$ (27.2)	$ 5.6	$ 164.8