Guarantor Financial Information (Condensed Consolidating Statements of Cash Flows) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) continuing operating activities	$ (84.8)	$ (17.2)	$ 877.7
Net cash provided by (used in) discontinued operating activities	(41.2)	9.2	292.7
Net cash provided by (used in) operating activities	(126.0)	(8.0)	1,170.4
Cash flows from investing activities:
Capital expenditures	(50.5)	(67.1)	(242.2)
Acquisition of businesses, net of cash acquired	(7.0)	0
Proceeds from sale of property, plant and equipment	5.3	4.2	24.3
Proceeds from business dispositions, net of cash sold			4.7
Net cash provided by (used in) continuing investing activities	(52.2)	(62.9)	(213.2)
Net cash provided by (used in) discontinued investing activities	0	(4.3)	(2.2)
Net cash provided by (used in) investing activities	(52.2)	(67.2)	(215.4)
Cash flows from financing activities:
Net proceeds (repayments) in debt	4.4	2.4	291.7
Debt issuance costs	(2.2)	0	(13.2)
Excess tax benefit from share based compensation			19.5
Net inter-company proceeds (payments)	0	0	0
Dividends paid to ordinary shareholders	(65.8)	(62.8)	(245.5)
Dividends paid to noncontrolling interests	(3.8)	0	(12.4)
Proceeds from shares issued under incentive plans	3.5	90.7	253.0
Repurchase of ordinary shares	(787.7)	0	(1,213.2)
Transfer from Allegion			1,274.2
Net cash provided by (used in) continuing financing activities	(851.6)	30.3	354.1
Net cash provided by (used in) discontinued financing activities	0	(3.7)	(7.5)
Net cash provided by (used in) financing activities	(851.6)	26.6	346.6
Effect of exchange rate changes on cash and cash equivalents	(9.5)	(0.6)	(72.8)
Net increase (decrease) in cash and cash equivalents	(1,039.3)	(49.2)	1,228.8
Cash and cash equivalents - beginning of period	1,937.2	708.4	708.4
Cash and cash equivalents - end of period	897.9	659.2	1,937.2
IR Ireland [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) continuing operating activities	(1.9)	(2.3)	(63.2)
Net cash provided by (used in) discontinued operating activities	0	0	0
Net cash provided by (used in) operating activities	(1.9)	(2.3)	(63.2)
Cash flows from investing activities:
Capital expenditures	0	0	0
Acquisition of businesses, net of cash acquired	0
Proceeds from sale of property, plant and equipment	0	0	0
Proceeds from business dispositions, net of cash sold			0
Net cash provided by (used in) continuing investing activities	0	0	0
Net cash provided by (used in) discontinued investing activities	0	0	0
Net cash provided by (used in) investing activities	0	0	0
Cash flows from financing activities:
Net proceeds (repayments) in debt	0	0	0
Debt issuance costs	0		0
Excess tax benefit from share based compensation			19.5
Net inter-company proceeds (payments)	851.9	(25.6)	(24.8)
Dividends paid to ordinary shareholders	(65.8)	(62.8)	(245.5)
Dividends paid to noncontrolling interests	0		0
Proceeds from shares issued under incentive plans	3.5	90.7	253.0
Repurchase of ordinary shares	(787.7)		(1,213.2)
Transfer from Allegion			1,274.2
Net cash provided by (used in) continuing financing activities	1.9	2.3	63.2
Net cash provided by (used in) discontinued financing activities	0	0	0
Net cash provided by (used in) financing activities	1.9	2.3	63.2
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents - beginning of period	0	0	0
Cash and cash equivalents - end of period	0	0	0
IR Limited [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) continuing operating activities	0	0	(0.1)
Net cash provided by (used in) discontinued operating activities	0	0	0
Net cash provided by (used in) operating activities	0	0	(0.1)
Cash flows from investing activities:
Capital expenditures	0	0	0
Acquisition of businesses, net of cash acquired	0
Proceeds from sale of property, plant and equipment	0	0	0
Proceeds from business dispositions, net of cash sold			0
Net cash provided by (used in) continuing investing activities	0	0	0
Net cash provided by (used in) discontinued investing activities	0	0	0
Net cash provided by (used in) investing activities	0	0	0
Cash flows from financing activities:
Net proceeds (repayments) in debt	0	0	0
Debt issuance costs	0		0
Excess tax benefit from share based compensation			0
Net inter-company proceeds (payments)	0	0	1,274.3
Dividends paid to ordinary shareholders	0	0	(1,274.2)
Dividends paid to noncontrolling interests	0		0
Proceeds from shares issued under incentive plans	0	0	0
Repurchase of ordinary shares	0		0
Transfer from Allegion			0
Net cash provided by (used in) continuing financing activities	0	0	0.1
Net cash provided by (used in) discontinued financing activities	0	0	0
Net cash provided by (used in) financing activities	0	0	0.1
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents - beginning of period	0	0	0
Cash and cash equivalents - end of period	0	0	0
IR International [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) continuing operating activities	(0.3)	(3.4)	(14.2)
Net cash provided by (used in) discontinued operating activities	0	0	0
Net cash provided by (used in) operating activities	(0.3)	(3.4)	(14.2)
Cash flows from investing activities:
Capital expenditures	0	0	0
Acquisition of businesses, net of cash acquired	0
Proceeds from sale of property, plant and equipment	0	0	0
Proceeds from business dispositions, net of cash sold			0
Net cash provided by (used in) continuing investing activities	0	0	0
Net cash provided by (used in) discontinued investing activities	0	0	0
Net cash provided by (used in) investing activities	0	0	0
Cash flows from financing activities:
Net proceeds (repayments) in debt	0	0	0
Debt issuance costs	0		0
Excess tax benefit from share based compensation			0
Net inter-company proceeds (payments)	0.5	3.4	699.7
Dividends paid to ordinary shareholders	0	0	(685.5)
Dividends paid to noncontrolling interests	0		0
Proceeds from shares issued under incentive plans	0	0	0
Repurchase of ordinary shares	0		0
Transfer from Allegion			0
Net cash provided by (used in) continuing financing activities	0.5	3.4	14.2
Net cash provided by (used in) discontinued financing activities	0	0	0
Net cash provided by (used in) financing activities	0.5	3.4	14.2
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	0.2	0	0
Cash and cash equivalents - beginning of period	0	0	0
Cash and cash equivalents - end of period	0.2	0	0
IR Global [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) continuing operating activities	(32.1)	(39.8)	(196.7)
Net cash provided by (used in) discontinued operating activities	0	0	0
Net cash provided by (used in) operating activities	(32.1)	(39.8)	(196.7)
Cash flows from investing activities:
Capital expenditures	0	0	0
Acquisition of businesses, net of cash acquired	0
Proceeds from sale of property, plant and equipment	0	0	0
Proceeds from business dispositions, net of cash sold			0
Net cash provided by (used in) continuing investing activities	0	0	0
Net cash provided by (used in) discontinued investing activities	0	0	0
Net cash provided by (used in) investing activities	0	0	0
Cash flows from financing activities:
Net proceeds (repayments) in debt	0	0	291.2
Debt issuance costs	(2.2)		(13.2)
Excess tax benefit from share based compensation			0
Net inter-company proceeds (payments)	(941.0)	(22.1)	2,106.3
Dividends paid to ordinary shareholders	0	0	(1,274.2)
Dividends paid to noncontrolling interests	0		0
Proceeds from shares issued under incentive plans	0	0	0
Repurchase of ordinary shares	0		0
Transfer from Allegion			0
Net cash provided by (used in) continuing financing activities	(943.2)	(22.1)	1,110.1
Net cash provided by (used in) discontinued financing activities	0	0	0
Net cash provided by (used in) financing activities	(943.2)	(22.1)	1,110.1
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	(975.3)	(61.9)	913.4
Cash and cash equivalents - beginning of period	975.3	61.9	61.9
Cash and cash equivalents - end of period	0	0	975.3
IR New Jersey [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) continuing operating activities	197.2	(178.7)	(170.5)
Net cash provided by (used in) discontinued operating activities	(42.6)	(25.9)	(112.2)
Net cash provided by (used in) operating activities	154.6	(204.6)	(282.7)
Cash flows from investing activities:
Capital expenditures	(21.6)	(20.8)	(80.1)
Acquisition of businesses, net of cash acquired	0
Proceeds from sale of property, plant and equipment	1.3	0.2	1.9
Proceeds from business dispositions, net of cash sold			0
Net cash provided by (used in) continuing investing activities	(20.3)	(20.6)	(78.2)
Net cash provided by (used in) discontinued investing activities	0	0	0
Net cash provided by (used in) investing activities	(20.3)	(20.6)	(78.2)
Cash flows from financing activities:
Net proceeds (repayments) in debt	0	0	(6.7)
Debt issuance costs	0		0
Excess tax benefit from share based compensation			0
Net inter-company proceeds (payments)	561.4	257.5	368.1
Dividends paid to ordinary shareholders	(734.1)	0	0
Dividends paid to noncontrolling interests	0		0
Proceeds from shares issued under incentive plans	0	0	0
Repurchase of ordinary shares	0		0
Transfer from Allegion			0
Net cash provided by (used in) continuing financing activities	(172.7)	257.5	361.4
Net cash provided by (used in) discontinued financing activities	0	0	0
Net cash provided by (used in) financing activities	(172.7)	257.5	361.4
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	(38.4)	32.3	0.5
Cash and cash equivalents - beginning of period	59.6	59.1	59.1
Cash and cash equivalents - end of period	21.2	91.4	59.6
Other Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) continuing operating activities	678.5	207.4	4,562.4
Net cash provided by (used in) discontinued operating activities	1.4	35.1	404.9
Net cash provided by (used in) operating activities	679.9	242.5	4,967.3
Cash flows from investing activities:
Capital expenditures	(28.9)	(46.3)	(162.1)
Acquisition of businesses, net of cash acquired	(7.0)
Proceeds from sale of property, plant and equipment	4.0	4.0	22.4
Proceeds from business dispositions, net of cash sold			4.7
Net cash provided by (used in) continuing investing activities	(31.9)	(42.3)	(135.0)
Net cash provided by (used in) discontinued investing activities	0	(4.3)	(2.2)
Net cash provided by (used in) investing activities	(31.9)	(46.6)	(137.2)
Cash flows from financing activities:
Net proceeds (repayments) in debt	4.4	2.4	7.2
Debt issuance costs	0		0
Excess tax benefit from share based compensation			0
Net inter-company proceeds (payments)	(472.9)	(213.2)	(4,423.6)
Dividends paid to ordinary shareholders	(192.0)	(0.4)	(1.2)
Dividends paid to noncontrolling interests	(3.8)		(12.4)
Proceeds from shares issued under incentive plans	0	0	0
Repurchase of ordinary shares	0		0
Transfer from Allegion			0
Net cash provided by (used in) continuing financing activities	(664.3)	(211.2)	(4,430.0)
Net cash provided by (used in) discontinued financing activities	0	(3.7)	(12.4)
Net cash provided by (used in) financing activities	(664.3)	(214.9)	(4,442.4)
Effect of exchange rate changes on cash and cash equivalents	(9.5)	(0.6)	(72.8)
Net increase (decrease) in cash and cash equivalents	(25.8)	(19.6)	314.9
Cash and cash equivalents - beginning of period	902.3	587.4	587.4
Cash and cash equivalents - end of period	876.5	567.8	902.3
Consolidating Adjustments [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) continuing operating activities	(926.2)	(0.4)	(3,240.0)
Net cash provided by (used in) discontinued operating activities	0	0	0
Net cash provided by (used in) operating activities	(926.2)	(0.4)	(3,240.0)
Cash flows from investing activities:
Capital expenditures	0	0	0
Acquisition of businesses, net of cash acquired	0
Proceeds from sale of property, plant and equipment	0	0	0
Proceeds from business dispositions, net of cash sold			0
Net cash provided by (used in) continuing investing activities	0	0	0
Net cash provided by (used in) discontinued investing activities	0	0	0
Net cash provided by (used in) investing activities	0	0	0
Cash flows from financing activities:
Net proceeds (repayments) in debt	0	0	0
Debt issuance costs	0		0
Excess tax benefit from share based compensation			0
Net inter-company proceeds (payments)	0.1	0	0
Dividends paid to ordinary shareholders	926.1	0.4	3,235.1
Dividends paid to noncontrolling interests	0		0
Proceeds from shares issued under incentive plans	0	0	0
Repurchase of ordinary shares	0		0
Transfer from Allegion			0
Net cash provided by (used in) continuing financing activities	926.2	0.4	3,235.1
Net cash provided by (used in) discontinued financing activities	0	0	4.9
Net cash provided by (used in) financing activities	926.2	0.4	3,240.0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Net increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents - beginning of period	0	0	0
Cash and cash equivalents - end of period	$ 0	$ 0	$ 0