Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net revenues	$ 2,238.0	$ 2,068.1	$ 2,118.3
Cost of Goods and Services Sold	1,252.7	1,199.0	1,264.6
Selling and administrative expenses	(559.8)	(510.5)	(527.4)
Operating income (loss)	425.5	358.6	326.3
Interest expense	(64.3)	(52.9)	(53.8)
Disposal Group, Not Discontinued Operation, Loss on Disposal	84.4	104.2	0.0
Other, net	(18.2)	(7.8)	4.6
Earnings (loss) before income taxes	295.0	209.3	267.9
Benefit (provision) for income taxes	63.8	54.6	84.2
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	231.2	154.7	183.7
Discontinued operations, net of tax	0.0	(0.4)	(11.1)
Net earnings	231.2	154.3	172.6
Other comprehensive income (loss)
Less: Net earnings attributable to noncontrolling interests	(2.1)	(0.4)	2.6
Net earnings (loss) attributable to Allegion plc	229.1	153.9	175.2
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(40.7)	(60.5)	(66.4)
Cash flow hedges and marketable securities unrealized net gains (losses) arising during period	9.7	15.8	2.0
Cash flow hedges and marketable securities net gains (losses) reclassified into earnings	(19.0)	(17.5)	(2.5)
Cash flow hedges and marketable securities tax (expense) benefit	(1.3)	0.0	(0.5)
Total cash flow hedges and marketable securities net of tax	(10.6)	(1.7)	(1.0)
Pension and OPEB adjustments prior service gains (costs) for the period	0.0	(0.1)	0.3
Pension and OPEB adjustments net actuarial gains (losses) for the period	3.1	(37.6)	(9.9)
Pension and OPEB adjustments amortization reclassified to earnings	6.0	5.4	4.3
Other comprehensive income loss pension and other postretirement benefits settlements and curtailments reclassified to earnings	0.3	1.1	0.0
Pension and OPEB adjustments currency translation and other	14.4	5.0	4.8
Pension and OPEB adjustments tax (expense) benefit	(5.0)	3.0	15.7
Total pension and OPEB adjustments, net of tax	18.8	(23.2)	15.2
Other comprehensive income (loss), net of tax	(32.5)	(85.4)	(52.2)
Total comprehensive income (loss), net of tax	198.7	68.9	120.4
Total comprehensive (income) loss attributable to noncontrolling interests	1.7	(0.9)	(3.3)
Total comprehensive income (loss) attributable to Allegion plc	197.0	69.8	123.7
Amounts attributable to Allegion plc ordinary shareholders:
Continuing operations	229.1	154.3	186.3
Discontinued operations	0.0	(0.4)	(11.1)
Net earnings (loss) attributable to Allegion plc	$ 229.1	$ 153.9	$ 175.2
Basic:
Continuing operations	$ 2.39	$ 1.61	$ 1.94
Discontinued operations	0.00	(0.01)	(0.12)
Net earnings (loss)	2.39	1.60	1.82
Diluted:
Continuing operations	2.36	1.59	1.92
Discontinued operations	0.00	0.00	(0.12)
Net earnings (loss)	2.36	1.59	1.80
Common stock, dividends, in dollars per share, declared	$ 0.48	$ 0.40	$ 0.32