XML 41 R28.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Insider Trading Arrangements | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 shares | Dec. 31, 2023 shares
Trading Arrangements, by Individual |  |
Material Terms of Trading Arrangement |  | Paul Beswick, our Senior Vice President and Chief Information Officer, adopted a new trading plan on December 4, 2023. The plan’s maximum length is until December 3, 2024, and first trades will not occur until March 4, 2024, at the earliest. The trading plan is intended to permit Mr. Beswick to (1) sell 1,450 shares, (2) sell up to 8,510 shares subject to performance stock units (" PSUs") and (3) exercise and sell 5,000 stock options. •Dean Klisura, our President and Chief Executive Officer of Guy Carpenter and Vice Chair, Marsh McLennan, adopted a new trading plan on December 4, 2023. The plan’s maximum length is until December 3, 2024, and first trades will not occur until March 4, 2024, at the earliest. The trading plan is intended to permit Mr. Klisura to (1) sell up to 4,256 shares subject to PSUs, (2) sell 1,419 shares subject to restricted stock units ("RSUs") and (3) exercise and sell 9,994 stock options. •Mark McGivney, our Chief Financial Officer, adopted a new trading plan on December 4, 2023. The plan’s maximum length is until December 3, 2024, and first trades will not occur until March 4, 2024, at the earliest. The trading plan is intended to permit Mr. McGivney to (1) sell up to 25,526 shares subject to PSUs and (2) exercise and sell 66,393 stock options. •Stacy Mills, our Vice President and Controller, adopted a new trading plan on December 13, 2023. The plan’s maximum length is until December 12, 2024, and first trades will not occur until March 13, 2024, at the earliest. The trading plan is intended to permit Ms. Mills to (1) sell up to 1,702 shares subject to PSUs, (2) sell 1,572 shares subject to RSUs and (3) exercise and sell 4,101 stock options.
Non-Rule 10b5-1 Arrangement Adopted | false |
Rule 10b5-1 Arrangement Terminated | false |
Non-Rule 10b5-1 Arrangement Terminated | false |
Paul Beswick [Member] |  |
Trading Arrangements, by Individual |  |
Name | Paul Beswick |
Title | Senior Vice President and Chief Information Officer |
Rule 10b5-1 Arrangement Adopted | true |
Adoption Date | December 4, 2023 |
Arrangement Duration | 365 days |
Dean Klisura [Member] |  |
Trading Arrangements, by Individual |  |
Name | Dean Klisura |
Title | President and Chief Executive Officer of Guy Carpenter and Vice Chair, Marsh McLennan |
Rule 10b5-1 Arrangement Adopted | true |
Adoption Date | December 4, 2023 |
Arrangement Duration | 365 days |
Mark McGivney [Member] |  |
Trading Arrangements, by Individual |  |
Name | Mark McGivney |
Title | Chief Financial Officer |
Rule 10b5-1 Arrangement Adopted | true |
Adoption Date | December 4, 2023 |
Arrangement Duration | 365 days |
Stacy Mills [Member] |  |
Trading Arrangements, by Individual |  |
Name | Stacy Mills |
Title | Vice President and Controller |
Rule 10b5-1 Arrangement Adopted | true |
Adoption Date | December 13, 2023 |
Arrangement Duration | 365 days |
Paul Beswick Rule Trading Arrangement, Shares [Member] | Paul Beswick [Member] |  |
Trading Arrangements, by Individual |  |
Aggregate Available | 1,450 | 1,450
Paul Beswick Trading Arrangement, Shares Subject To Performance Stock Units [Member] | Paul Beswick [Member] |  |
Trading Arrangements, by Individual |  |
Aggregate Available | 8,510 | 8,510
Paul Beswick Rule Trading Arrangement, Stock Options [Member] | Paul Beswick [Member] |  |
Trading Arrangements, by Individual |  |
Aggregate Available | 5,000 | 5,000
Dean Klisura Trading Arrangement, Shares Subject To Performance Stock Units [Member] | Dean Klisura [Member] |  |
Trading Arrangements, by Individual |  |
Aggregate Available | 4,256 | 4,256
Dean Klisura Rule Trading Arrangement, Restricted Stock Units [Member] | Dean Klisura [Member] |  |
Trading Arrangements, by Individual |  |
Aggregate Available | 1,419 | 1,419
Dean Klisura Rule Trading Arrangement, Stock Option [Member] | Dean Klisura [Member] |  |
Trading Arrangements, by Individual |  |
Aggregate Available | 9,994 | 9,994
Mark McGivney Trading Arrangement, Shares Subject To Performance Stock Units [Member] | Mark McGivney [Member] |  |
Trading Arrangements, by Individual |  |
Aggregate Available | 25,526 | 25,526
Mark McGivney Trading Arrangement, Stock Options [Member] | Mark McGivney [Member] |  |
Trading Arrangements, by Individual |  |
Aggregate Available | 66,393 | 66,393
Stacy Mills Trading Arrangement, Shares Subject To Performance Stock Units [Member] | Stacy Mills [Member] |  |
Trading Arrangements, by Individual |  |
Aggregate Available | 1,702 | 1,702
Stacy Mills Trading Arrangement, Shares Subject To Restricted Stock Units [Member] | Stacy Mills [Member] |  |
Trading Arrangements, by Individual |  |
Aggregate Available | 1,572 | 1,572
Stacy Mills Trading Arrangement, Stock Options [Member] | Stacy Mills [Member] |  |
Trading Arrangements, by Individual |  |
Aggregate Available | 4,101 | 4,101

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 408 -Subsection a -Paragraph 1 + Details
Name: | ecd_MtrlTermsOfTrdArrTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 408 -Subsection a -Paragraph 1 + Details
Name: | ecd_NonRule10b51ArrAdoptedFlag
Namespace Prefix: | ecd_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 408 -Subsection a -Paragraph 1 + Details
Name: | ecd_NonRule10b51ArrTrmntdFlag
Namespace Prefix: | ecd_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 408 -Subsection a -Paragraph 1 + Details
Name: | ecd_Rule10b51ArrAdoptedFlag
Namespace Prefix: | ecd_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 408 -Subsection a -Paragraph 1 + Details
Name: | ecd_Rule10b51ArrTrmntdFlag
Namespace Prefix: | ecd_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 408 -Subsection a -Paragraph 2 -Subparagraph A + Details
Name: | ecd_TradingArrByIndTable
Namespace Prefix: | ecd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 408 -Subsection a -Paragraph 2 -Subparagraph B + Details
Name: | ecd_TrdArrAdoptionDate
Namespace Prefix: | ecd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 408 -Subsection a -Paragraph 2 -Subparagraph C + Details
Name: | ecd_TrdArrDuration
Namespace Prefix: | ecd_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 408 -Subsection a -Paragraph 2 -Subparagraph A + Details
Name: | ecd_TrdArrIndName
Namespace Prefix: | ecd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 408 -Subsection a -Paragraph 2 -Subparagraph A + Details
Name: | ecd_TrdArrIndTitle
Namespace Prefix: | ecd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 408 -Subsection a -Paragraph 2 -Subparagraph D + Details
Name: | ecd_TrdArrSecuritiesAggAvailAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ecd_IndividualAxis=mmc_PaulBeswickMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_IndividualAxis=mmc_DeanKlisuraMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_IndividualAxis=mmc_MarkMcGivneyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_IndividualAxis=mmc_StacyMillsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_TradingArrAxis=mmc_PaulBeswickRuleTradingArrangementSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_TradingArrAxis=mmc_PaulBeswickTradingArrangementSharesSubjectToPerformanceStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_TradingArrAxis=mmc_PaulBeswickRuleTradingArrangementStockOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_TradingArrAxis=mmc_DeanKlisuraTradingArrangementSharesSubjectToPerformanceStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_TradingArrAxis=mmc_DeanKlisuraRuleTradingArrangementRestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_TradingArrAxis=mmc_DeanKlisuraRuleTradingArrangementStockOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_TradingArrAxis=mmc_MarkMcGivneyTradingArrangementSharesSubjectToPerformanceStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_TradingArrAxis=mmc_MarkMcGivneyTradingArrangementStockOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_TradingArrAxis=mmc_StacyMillsTradingArrangementSharesSubjectToPerformanceStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_TradingArrAxis=mmc_StacyMillsTradingArrangementSharesSubjectToRestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_TradingArrAxis=mmc_StacyMillsTradingArrangementStockOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |