Income Taxes (Valuation Allowance) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Beginning balance	$ 218.5	$ 156.2	$ 308.4
Accumulated other comprehensive income (loss)	(4.2)	(0.7)	(4.3)
Ending balance	210.7	218.5	156.2
Increase to valuation allowance [Member]
Valuation allowance change	35.2	89.3	44.5
Decrease to valuation allowance [Member]
Valuation allowance change	$ (38.8)	$ (26.3)	$ (192.4)

Accumulated Other Comprehensive Income Or LossOn Valuation Allowance Deferred Tax Assets

No definition available.

Name:	ir_AccumulatedOtherComprehensiveIncomeOrLossonValuationAllowanceDeferredTaxAssets
Namespace Prefix:	ir_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

+ Details

Name:	us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 45

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e32123-109318

+ Details

Name:	us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_StatementScenarioAxis=ir_DecreaseToValuationAllowanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=ir_IncreaseToValuationAllowanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: