XML 23 R11.htm IDEA: XBRL DOCUMENT
v3.23.3

Fiduciary Assets and Liabilities | 9 Months Ended
--- | ---
Sep. 30, 2023
Fiduciary Assets And Liabilities [Abstract] |
Fiduciary Assets and Liabilities | Fiduciary Assets and Liabilities The Company, in its capacity as an insurance broker or agent, generally collects premiums from insureds and after deducting its commissions, remits the premiums to the respective insurance underwriters. The Company also collects claims or refunds from underwriters on behalf of insureds. Unremitted insurance premiums and claims proceeds are held by the Company in a fiduciary capacity. The Company's fiduciary assets primarily include bank or short-term time deposits and liquid money market funds, classified as cash and cash equivalents. Since fiduciary assets are not available for corporate use, they are shown separately in the consolidated balance sheets as cash and cash equivalents held in a fiduciary capacity, with a corresponding amount in current liabilities. Risk and Insurance Services revenue includes interest on fiduciary funds of $131 million and $330 million for the three and nine months ended September 30, 2023, respectively, and $40 million and $57 million for the three and nine months ended September 30, 2022, respectively. Net uncollected premiums and claims and the related payables were $14.4 billion at September 30, 2023, and $13.0 billion at December 31, 2022. The Company is not a principal to the contracts under which the right to receive premiums or the right to receive reimbursement of insured losses arises. Accordingly, net uncollected premiums and claims and the related payables are not assets and liabilities of the Company and are not included in the accompanying consolidated balance sheets. In certain instances, the Company advances premiums, refunds or claims to insurance underwriters or insureds prior to collection. These advances are made from corporate funds and are reflected in the accompanying consolidated balance sheets as receivables. The Company, through its Mercer subsidiary, manages assets in trusts or funds for which Mercer’s management or trustee fee is not considered a variable interest, since the fees are commensurate with the level of effort required to provide those services. Mercer is not the primary beneficiary of these trusts or funds. Mercer’s maximum exposure to loss of its interests is, therefore, limited to collection of its fees. Reclassification of Fiduciary Assets and Liabilities In the second quarter of 2023, the Company changed the presentation of fiduciary assets and liabilities on the consolidated balance sheets. Cash and cash equivalents held in a fiduciary capacity was reclassified from an offset to fiduciary liabilities to current assets, with the corresponding fiduciary liabilities reclassified to current liabilities. The reclassification had no impact on the Company’s total equity at December 31, 2022. The presentation in the December 31, 2022 consolidated balance sheet was conformed to the current presentation as follows:
(In millions) | As Reported | As Reclassified
Total current assets | $ | 8,299 |  | $ | 18,959 |
Total assets | $ | 33,454 |  | $ | 44,114 |
Total current liabilities | $ | 7,172 |  | $ | 17,832 |
As a result of reclassifying cash and cash equivalents held in a fiduciary capacity, total RIS assets and total Consulting assets at December 31, 2022 increased to $33,022 million and $10,446 million, respectiv ely.

X
- Definition Fiduciary Assets And Liabilities [Abstract] + References No definition available. + Details
Name: | mmc_FiduciaryAssetsAndLiabilitiesAbstract
Namespace Prefix: | mmc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Describes a general nature of fiduciary assets and liabilities related to and how they are recorded. + References No definition available. + Details
Name: | mmc_FiduciaryAssetsAndLiabilitiesTextBlock
Namespace Prefix: | mmc_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration