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Revenue (Tables) | 9 Months Ended
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Sep. 30, 2018
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following schedule disaggregates various components of the Company's revenue:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2018 |  | 2018
Marsh: |  |  |  |
EMEA |  | $ | 441 |  |  | $ | 1,610 |
Asia Pacific |  | 167 |  |  | 514 |
Latin America |  | 96 |  |  | 279 |
Total International |  | 704 |  |  | 2,403 |
U.S./Canada |  | 926 |  |  | 2,670 |
Total Marsh |  | 1,630 |  |  | 5,073 |
Guy Carpenter |  | 215 |  |  | 1,184 |
Subtotal |  | 1,845 |  |  | 6,257 |
Fiduciary interest income |  | 18 |  |  | 46 |
Total Risk and Insurance Services |  | $ | 1,863 |  |  | $ | 6,303 |
Mercer: |  |  |  |
Defined Benefit Consulting & Administration |  | $ | 300 |  |  | $ | 959 |
Investment Management & Related Services |  | 225 |  |  | 683 |
Total Wealth |  | 525 |  |  | 1,642 |
Health |  | 415 |  |  | 1,286 |
Career |  | 235 |  |  | 576 |
Total Mercer |  | 1,175 |  |  | 3,504 |
Oliver Wyman |  | 481 |  |  | 1,470 |
Total Consulting |  | $ | 1,656 |  |  | $ | 4,974 |
Contract with Customer, Asset and Liability | The following schedule provides contract assets and contract liabilities information from contracts with customers.
(In millions) |  | September 30, 2018 | January 1, 2018
Contract Assets |  | $ | 139 |  | $ | 128 |
Contract Liabilities |  | $ | 577 |  | $ | 583 |

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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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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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