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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2018
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following schedule disaggregates various components of the Company's revenue:
|  | Twelve Months Ended December 31,
|  | 2018 |  |  | 2017 |
Marsh: |  |  |  |
EMEA |  | $ | 2,132 |  |  | $ | 2,033 |
Asia Pacific |  | 683 |  |  | 645 |
Latin America |  | 400 |  |  | 404 |
Total International |  | 3,215 |  |  | 3,082 |
U.S./Canada |  | 3,662 |  |  | 3,322 |
Total Marsh |  | 6,877 |  |  | 6,404 |
Guy Carpenter |  | 1,286 |  |  | 1,187 |
Subtotal |  | 8,163 |  |  | 7,591 |
Fiduciary interest income |  | 65 |  |  | 39 |
Total Risk and Insurance Services |  | $ | 8,228 |  |  | $ | 7,630 |
Mercer: |  |  |  |
Defined Benefit Consulting & Administration |  | $ | 1,279 |  |  | $ | 1,381 |
Investment Management & Related Services |  | 906 |  |  | 767 |
Total Wealth |  | 2,185 |  |  | 2,148 |
Health |  | 1,735 |  |  | 1,648 |
Career |  | 812 |  |  | 732 |
Total Mercer |  | 4,732 |  |  | 4,528 |
Oliver Wyman |  | 2,047 |  |  | 1,916 |
Total Consulting |  | $ | 6,779 |  |  | $ | 6,444 |
Note: The 2017 information is prior to the adoption of ASC 606.
Contract with Customer, Asset and Liability | The following schedule provides contract assets and contract liabilities information from contracts with customers.
(In millions) |  | December 31, 2018 | January 1, 2018
Contract Assets |  | $ | 112 |  | $ | 128 |
Contract Liabilities |  | $ | 545 |  | $ | 583 |

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