Revenue From Contract With Customer, Required Payment, Number Of Days

No definition available.

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- Definition

Revenue, Remaining Performance Obligation, Expected To Be Recognized Over Next Twelve Months, Percent

+ References

No definition available.

+ Details

Name:	rop_RevenueRemainingPerformanceObligationExpectedToBeRecognizedOverNextTwelveMonthsPercent
Namespace Prefix:	rop_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of expense recognized in the current period for the periodic realization of capitalized fees that were paid to salespeople, distributors, brokers, and agents at the time of the conclusion of the sale. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of the cumulative effect on retained earnings net of related income tax effect.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22663-107794

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Carrying amount of advanced commission payments.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredSalesCommission
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84173487&loc=SL51747714-108306

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130556-203045

+ Details

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

- Details

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- Details

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- Details

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- Details

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- Details

Name:	us-gaap_ProductOrServiceAxis=rop_PostContractSupportMember
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- Details

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Basis of Presentation (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
	Jan. 01, 2018	Sep. 30, 2018	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Deferred commission	$ 20.7	$ 25.4	$ 25.4
Amortization of deferred sales commissions		6.4	17.7
Remaining performance obligation		$ 2,817.4	$ 2,817.4
Remaining performance obligation expected to be recognized over next twelve months, percent		60.00%	60.00%
Software-As-A-Service
Disaggregation of Revenue [Line Items]
Required payment, number of days			30 days
Software Licenses \| Minimum
Disaggregation of Revenue [Line Items]
Required payment, number of days			30 days
Software Licenses \| Maximum
Disaggregation of Revenue [Line Items]
Required payment, number of days			60 days
PCS \| Minimum
Disaggregation of Revenue [Line Items]
Required payment, number of days			30 days
PCS \| Maximum
Disaggregation of Revenue [Line Items]
Required payment, number of days			60 days
Engineered Products \| Minimum
Disaggregation of Revenue [Line Items]
Required payment, number of days			30 days
Engineered Products \| Maximum
Disaggregation of Revenue [Line Items]
Required payment, number of days			60 days
Accounting Standards Update 2014-09
Disaggregation of Revenue [Line Items]
Cumulative effect on retained earnings	$ 14.3