Rendering

Component: (Network and Table)
Network
2413402 - Disclosure - Goodwill and Acquired Client Relationships - Schedule of Changes in Goodwill (Details)
(http://www.amg.com/role/GoodwillAndAcquiredClientRelationshipsScheduleOfChangesInGoodwillDetails)
TableSchedule of Goodwill [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001004434 (http://www.sec.gov/CIK)
GoodwillPeriod [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
Segments [Axis]Segments [Axis]
InstitutionalMutual FundHigh Net WorthSegments [Domain]InstitutionalMutual FundHigh Net WorthSegments [Domain]
Goodwill impairment
   
0  
   
0  
Changes in goodwill
 
 
 
 
 
 
 
 
Balance at the beginning of the period
1,141,300,000  
1,119,500,000  
407,600,000  
2,668,400,000  
1,159,100,000  
1,125,300,000  
368,400,000  
2,652,800,000  
Goodwill acquired
0  
0  
0  
0  
9,200,000  
0  
55,100,000  
64,300,000  
Foreign currency translation
(5,100,000) 
(37,000,000) 
1,800,000  
(40,300,000) 
(27,000,000) 
(5,800,000) 
(15,900,000) 
(48,700,000) 
Balance at the end of the period
1,136,200,000  
 
1,082,500,000  
 
409,400,000  
 
2,628,100,000  
 
1,141,300,000  
 
1,119,500,000  
 
407,600,000  
 
2,668,400,000