Rendering

Component: (Network and Table)
Network
2406402 - Disclosure - Goodwill And Other Intangibles (Changes In The Carrying Amount Of Goodwill) (Details)
(http://mmc.com/role/GoodwillAndOtherIntangiblesChangesInCarryingAmountOfGoodwillDetails)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000062709 (http://www.sec.gov/CIK)
Goodwill and Intangible Assets Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
Goodwill and Intangible Assets Disclosure [Abstract]
 
 
Goodwill [Roll Forward]
 
 
Balance as of January 1, as reported
7,889,000,000  
7,241,000,000  
Goodwill acquired
556,000,000  
783,000,000  
Other adjustments
(76,000,000)1
(135,000,000)1
Balance at December 31,
8,369,000,000  
 
7,889,000,000  
 
1: Primarily due to the impact of foreign exchange in both years.