XML 105 R88.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Equity Method Investments (Details) | Dec. 31, 2021 ventures
--- | ---
Schedule of Equity Method Investments [Line Items] |
Number of joint ventures | 6
Chile |
Schedule of Equity Method Investments [Line Items] |
Number of joint ventures | 1
China |
Schedule of Equity Method Investments [Line Items] |
Number of joint ventures | 1
India |
Schedule of Equity Method Investments [Line Items] |
Number of joint ventures | 1
Saudi Arabia |
Schedule of Equity Method Investments [Line Items] |
Number of joint ventures | 1
South Korea |
Schedule of Equity Method Investments [Line Items] |
Number of joint ventures | 1
United Arab Emirates |
Schedule of Equity Method Investments [Line Items] |
Number of joint ventures | 1

X
- Definition Number of Joint Ventures. + References No definition available. + Details
Name: | fls_NumberOfJointVentures
Namespace Prefix: | fls_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- 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
Name: | us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_StatementGeographicalAxis=country_CL
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_CN
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_IN
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_SA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_KR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_AE
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |