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Revenue (Tables) | 3 Months Ended
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Mar. 31, 2019
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following schedule disaggregates components of the Company's revenue:
|  | Three Months Ended March 31,
|  | 2019
Marsh: |  |
EMEA |  | $ | 633 |
Asia Pacific |  | 165 |
Latin America |  | 78 |
Total International |  | 876 |
U.S./Canada |  | 861 |
Total Marsh |  | 1,737 |
Guy Carpenter |  | 663 |
Subtotal |  | 2,400 |
Fiduciary interest income |  | 23 |
Total Risk and Insurance Services |  | $ | 2,423 |
Mercer: |  |
Wealth |  | $ | 543 |
Health |  | 442 |
Career |  | 170 |
Total Mercer |  | 1,155 |
Oliver Wyman |  | 518 |
Total Consulting |  | $ | 1,673 |
Contract with Customer, Asset and Liability | The following schedule provides contract assets and contract liabilities information from contracts with customers.
(In millions) |  | March 31, 2019 | January 1, 2019
Contract Assets |  | $ | 198 |  | $ | 112 |
Contract Liabilities |  | $ | 611 |  | $ | 545 |

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130551-203045 + Details
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