Debt - Credit Agreements (Details) $ in Millions	3 Months Ended
Mar. 31, 2019 USD ($)
Revolving lines of credit
Maximum commitment	$ 762.5
Actual leverage ratio	0.91
Actual interest coverage ratio	23.6
US Dollar revolving loan under the 2015 Credit Agreement
Revolving lines of credit
Maximum commitment	$ 500.0
Maximum leverage ratio allowed	3.5
Minimum interest coverage ratio required	2.5
US Dollar revolving loan under the 2015 Credit Agreement \| Minimum
Revolving lines of credit
Facility fee (as a percent)	0.10%
US Dollar revolving loan under the 2015 Credit Agreement \| Maximum
Revolving lines of credit
Facility fee (as a percent)	0.20%
US Dollar revolving loan under the 2015 Credit Agreement \| Greatest of prime rate, federal funds rate plus spread and adjusted LIBOR plus spread \| Minimum
Revolving lines of credit
Interest rate added to base rate (as a percent)	0.00%
US Dollar revolving loan under the 2015 Credit Agreement \| Greatest of prime rate, federal funds rate plus spread and adjusted LIBOR plus spread \| Maximum
Revolving lines of credit
Interest rate added to base rate (as a percent)	0.30%
US Dollar revolving loan under the 2015 Credit Agreement \| Prime rate
Revolving lines of credit
Variable interest rate base	prime rate
US Dollar revolving loan under the 2015 Credit Agreement \| Federal funds rate
Revolving lines of credit
Variable interest rate base	federal funds rate
Interest rate added to base rate (as a percent)	0.50%
US Dollar revolving loan under the 2015 Credit Agreement \| Adjusted LIBOR
Revolving lines of credit
Variable interest rate base	adjusted LIBOR
Interest rate added to base rate (as a percent)	1.00%
US Dollar revolving loan under the 2015 Credit Agreement \| LIBOR
Revolving lines of credit
Variable interest rate base	LIBOR
US Dollar revolving loan under the 2015 Credit Agreement \| LIBOR \| Minimum
Revolving lines of credit
Interest rate added to base rate (as a percent)	0.90%
US Dollar revolving loan under the 2015 Credit Agreement \| LIBOR \| Maximum
Revolving lines of credit
Interest rate added to base rate (as a percent)	1.30%

The entity's actual interest coverage ratio, calculated as defined in the terms of the debt agreement.

No definition available.

Name:	brkr_DebtInstrumentActualInterestCoverageRatio
Namespace Prefix:	brkr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

The entity's actual leverage ratio, calculated as defined in the terms of the debt agreement.

+ References

No definition available.

+ Details

Name:	brkr_DebtInstrumentActualLeverageRatio
Namespace Prefix:	brkr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

The minimum interest coverage ratio required to be maintained under the terms of the debt agreement.

+ References

No definition available.

+ Details

Name:	brkr_DebtInstrumentCovenantInterestCoverageRatio
Namespace Prefix:	brkr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum leverage ratio allowed under the terms of the debt agreement.

+ References

No definition available.

+ Details

Name:	brkr_DebtInstrumentCovenantLeverageRatio
Namespace Prefix:	brkr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

The facility fee on the debt instrument, expressed as a percentage of the total borrowing capacity.

+ References

No definition available.

+ Details

Name:	brkr_DebtInstrumentFacilityFeePercentage
Namespace Prefix:	brkr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=brkr_UnitedStatesDollarRevolvingLoanUnder2015CreditAgreementMember
Namespace Prefix:
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- Details

Name:	srt_RangeAxis=srt_MinimumMember
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- Details

Name:	srt_RangeAxis=srt_MaximumMember
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- Details

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- Details

Name:	us-gaap_VariableRateAxis=us-gaap_PrimeRateMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_VariableRateAxis=brkr_FederalFundsRateMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_VariableRateAxis=brkr_AdjustedLondonInterbankOfferedRateLIBORMember
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- Details

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