Pensions and Postretirement Benefits Other Than Pensions (Schedule of Company's Postretirement Plans Benefit Obligations) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Postretirement [Member]
Benefit obligation at beginning of year	$ 851.4		$ 919.9
Service cost	6.6		7.3
Interest cost	26.0		30.8
Plan participants' contributions	11.2		19.1
Actuarial (gains) losses	(109.8)		15.4
Benefits paid, net of Medicare Part D subsidy	(56.4)	[1]	(78.8)	[1]
Settlements/curtailments	0		0
Amendments	0		(62.3)
Other, including expenses paid	(1.6)		0
Benefit obligation at end of year	713.3		851.4
Allegion [Member]
Increase (Decrease) in Pension Plan Obligations	(631.1)
Allegion [Member] | Postretirement [Member]
Increase (Decrease) in Postretirement Obligations	$ (14.1)		$ 0

[1] Amounts are net of Medicare Part D subsidy of $12.8 million and $0.7 million in 2013 and 2012, respectively