XML 45 R32.htm IDEA: XBRL DOCUMENT
v3.22.2

Segment Information - Net Sales by Major Product Line (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 25, 2022 | Jun. 26, 2021 | Jun. 25, 2022 | Jun. 26, 2021
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | $ 1,150,042 | $ 1,012,592 | $ 2,160,044 | $ 1,830,740
Operating Segments |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 1,168,466 | 1,023,364 | 2,186,830 | 1,846,990
Operating Segments | Piping Systems |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 824,807 | 711,616 | 1,528,237 | 1,259,364
Operating Segments | Industrial Metals |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 179,175 | 180,040 | 353,487 | 344,892
Operating Segments | Climate |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 164,484 | 131,708 | 305,106 | 242,734
Operating Segments | Tube and fittings |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 674,579 | 567,092 | 1,246,089 | 993,231
Operating Segments | Tube and fittings | Piping Systems |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 674,579 | 567,092 | 1,246,089 | 993,231
Operating Segments | Tube and fittings | Industrial Metals |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 0 | 0 | 0 | 0
Operating Segments | Tube and fittings | Climate |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 0 | 0 | 0 | 0
Operating Segments | Brass rod and forgings |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 142,788 | 142,974 | 279,321 | 274,236
Operating Segments | Brass rod and forgings | Piping Systems |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 0 | 0 | 0 | 0
Operating Segments | Brass rod and forgings | Industrial Metals |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 142,788 | 142,974 | 279,321 | 274,236
Operating Segments | Brass rod and forgings | Climate |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 0 | 0 | 0 | 0
Operating Segments | OEM components, tube & assemblies |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 52,780 | 64,615 | 101,968 | 122,270
Operating Segments | OEM components, tube & assemblies | Piping Systems |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 0 | 8,456 | 0 | 17,011
Operating Segments | OEM components, tube & assemblies | Industrial Metals |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 20,254 | 12,710 | 40,350 | 23,743
Operating Segments | OEM components, tube & assemblies | Climate |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 32,526 | 43,449 | 61,618 | 81,516
Operating Segments | Valves and plumbing specialties |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 150,228 | 136,068 | 282,148 | 249,122
Operating Segments | Valves and plumbing specialties | Piping Systems |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 150,228 | 136,068 | 282,148 | 249,122
Operating Segments | Valves and plumbing specialties | Industrial Metals |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 0 | 0 | 0 | 0
Operating Segments | Valves and plumbing specialties | Climate |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 0 | 0 | 0 | 0
Operating Segments | Flex duct and other HVAC components |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 131,958 | 88,259 | 243,488 | 161,218
Operating Segments | Flex duct and other HVAC components | Piping Systems |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 0 | 0 | 0 | 0
Operating Segments | Flex duct and other HVAC components | Industrial Metals |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 0 | 0 | 0 | 0
Operating Segments | Flex duct and other HVAC components | Climate |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 131,958 | 88,259 | 243,488 | 161,218
Operating Segments | Other |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 16,133 | 24,356 | 33,816 | 46,913
Operating Segments | Other | Piping Systems |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 0 | 0 | 0 | 0
Operating Segments | Other | Industrial Metals |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 16,133 | 24,356 | 33,816 | 46,913
Operating Segments | Other | Climate |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | 0 | 0 | 0 | 0
Intersegment sales |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net sales | $ (18,424) | $ (10,772) | $ (26,786) | $ (16,250)

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mli_PipingSystemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mli_IndustrialMetalsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mli_ClimateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mli_TubeAndFittingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mli_BrassRodAndForgingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mli_OemComponentsTubeAndAssembliesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mli_ValvesAndPlumbingSpecialtiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mli_FlexDuctAndOtherHVACComponentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mli_OtherProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_IntersegmentEliminationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |