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Segment Information | 3 Months Ended
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Mar. 31, 2020
Segment Reporting [Abstract] |
Segment Information | Segment Information The Company is organized based on the types of services provided. Under this structure, the Company’s segments are:
▪ | Risk and Insurance Services, comprising insurance services (Marsh) and reinsurance services (Guy Carpenter); and
▪ | Consulting, comprising Mercer and Oliver Wyman Group.
The accounting policies of the segments are the same as those used for the consolidated financial statements described in Note 1 to the Company’s 2019 Form 10-K. Segment performance is evaluated based on segment operating income, which includes directly related expenses, and charges or credits related to integration and restructuring but not the Company’s corporate-level expenses. Revenues are attributed to geographic areas on the basis of where the services are performed. Prior to being acquired by the Company, JLT operated in three segments: Specialty, Reinsurance and Employee Benefits. JLT operated in 41 countries, with significant revenue in the United Kingdom, Pacific, Asia and the United States. As of April 1, 2019, the historical JLT businesses were combined into MMC operations as follows: JLT Specialty is included by geography within Marsh, JLT Reinsurance is included in Guy Carpenter and the majority of JLT's Employee Benefits business was included in Mercer Health and Wealth. Selected information about the Company’s operating segments for the three-month periods ended March 31, 2020 and 2019 are as follows:
| Three Months Ended March 31,
(In millions) | Revenue |  | Operating Income (Loss)
2020– |  |  |
Risk and Insurance Services | $ | 2,911 |  | (a) | $ | 854 |
Consulting | 1,762 |  | (b) | 282 |
Total Operating Segments | 4,673 |  |  | 1,136 |
Corporate/Eliminations | (22 | ) |  | (66 | )
Total Consolidated | $ | 4,651 |  |  | $ | 1,070 |
2019– |  |  |
Risk and Insurance Services | $ | 2,423 |  | (a) | $ | 733 |
Consulting | 1,673 |  | (b) | 279 |
Total Operating Segments | 4,096 |  |  | 1,012 |
Corporate/Eliminations | (25 | ) |  | (74 | )
Total Consolidated | $ | 4,071 |  |  | $ | 938 |
(a) Includes inter-segment revenue of $1 million in both 2020 and 2019, interest income on fiduciary funds of $23 million in both 2020 and 2019 and equity method loss of $1 million in 2020 and equity method income of $2 million in 2019. (b) Includes inter-segment revenue of $21 million and $24 million in 2020 and 2019, respectively, interest income on fiduciary funds of $1 million in both 2020 and 2019, and equity method income of $4 million and $5 million in 2020 and 2019, respectively. Details of operating segment revenue for the three-month periods ended March 31, 2020 and 2019 are as follows:
| Three Months Ended March 31,
(In millions) | 2020 |  |  | 2019 |
Risk and Insurance Services |  |  |
Marsh | $ | 2,076 |  |  | $ | 1,753 |
Guy Carpenter | 835 |  |  | 670 |
Total Risk and Insurance Services | 2,911 |  |  | 2,423 |
Consulting |  |  |
Mercer | 1,251 |  |  | 1,155 |
Oliver Wyman Group | 511 |  |  | 518 |
Total Consulting | 1,762 |  |  | 1,673 |
Total Operating Segments | 4,673 |  |  | 4,096 |
Corporate/Eliminations | (22 | ) |  | (25 | )
Total | $ | 4,651 |  |  | $ | 4,071 |

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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