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Segment Information (Tables) | 9 Months Ended
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Sep. 30, 2023
Segment Reporting [Abstract] |
Selected Information And Details For MMC's Operating Segments | Selected information about the Company’s segments for the three and nine months ended September 30, 2023 and 2022 is as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(In millions) | Revenue |  | Operating Income/(Loss) |  | Revenue |  | Operating Income/(Loss)
2023 – |  |  |  |  |  |  |
Risk and Insurance Services | $ | 3,190 |  | (a) | $ | 640 |  |  | $ | 10,818 |  | (c) | $ | 3,192 |
Consulting | 2,206 |  | (b) | 424 |  |  | 6,409 |  | (d) | 1,223 |
Total Operating Segments | 5,396 |  |  | 1,064 |  |  | 17,227 |  |  | 4,415 |
Corporate/Eliminations | (14) |  |  | (68) |  |  | (45) |  |  | (236) |
Total Consolidated | $ | 5,382 |  |  | $ | 996 |  |  | $ | 17,182 |  |  | $ | 4,179 |
2022 – |  |  |  |  |  |  |
Risk and Insurance Services | $ | 2,838 |  | (a) | $ | 529 |  |  | $ | 9,700 |  | (c) | $ | 2,617 |
Consulting | 1,951 |  | (b) | 350 |  |  | 6,045 |  | (d) | 1,217 |
Total Operating Segments | 4,789 |  |  | 879 |  |  | 15,745 |  |  | 3,834 |
Corporate/Eliminations | (19) |  |  | (88) |  |  | (47) |  |  | (234) |
Total Consolidated | $ | 4,770 |  |  | $ | 791 |  |  | $ | 15,698 |  |  | $ | 3,600 |
(a) Includes interest income on fiduciary funds of $131 million and $40 million in 2023 and 2022, respectively; and equity method income of $3 million in 2023. (b) Includes inter-segment revenue of $14 million and $19 million in 2023 and 2022, respectively. (c) Includes inter-segment revenue of $5 million in both 2023 and 2022, interest income on fiduciary funds of $330 million and $57 million in 2023 and 2022, respectively, and equity method income of $14 million and $9 million in 2023 and 2022, respectively. Revenue for 2022 also includes the loss on deconsolidation of the Russian businesses at Marsh of $27 million. (d) Includes inter-segment revenue of $40 million and $42 million in 2023 and 2022, respectively. Revenue for 2023 also includes the loss on sale of an individual financial advisory business in Canada of $17 million. Revenue for 2022 also includes a gain on the sale of the Mercer U.S. affinity business of $112 million, partially offset by the loss on deconsolidation of the Russian businesses at Oliver Wyman Group of $12 million.
Schedule of Details of Operating Segment Revenue | Details of operating segment revenue for the three and nine months ended September 30, 2023 and 2022 are as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(In millions) | 2023 |  | 2022 |  | 2023 |  | 2022
Risk and Insurance Services |  |  |  |  |  |  |
Marsh | $ | 2,782 |  |  | $ | 2,497 |  |  | $ | 8,685 |  |  | $ | 7,833 |
Guy Carpenter | 408 |  |  | 341 |  |  | 2,133 |  |  | 1,867 |
Total Risk and Insurance Services | 3,190 |  |  | 2,838 |  |  | 10,818 |  |  | 9,700 |
Consulting |  |  |  |  |  |  |
Mercer | 1,425 |  |  | 1,284 |  |  | 4,143 |  |  | 4,016 |
Oliver Wyman Group | 781 |  |  | 667 |  |  | 2,266 |  |  | 2,029 |
Total Consulting | 2,206 |  |  | 1,951 |  |  | 6,409 |  |  | 6,045 |
Total Operating Segments | 5,396 |  |  | 4,789 |  |  | 17,227 |  |  | 15,745 |
Corporate Eliminations | (14) |  |  | (19) |  |  | (45) |  |  | (47) |
Total | $ | 5,382 |  |  | $ | 4,770 |  |  | $ | 17,182 |  |  | $ | 15,698 |

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- Definition Tabular disclosure of all significant reconciling items in the reconciliation of total revenues from reportable segments to the entity's consolidated revenues. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-31 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-30 + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482573/350-20-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-25 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-30 + Details
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