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Segment Information
 9 Months Ended
Sep. 30, 2016
Segment Reporting [Abstract]  
Segment Information
Segment Information
The Company is organized based on the types of services provided. Under this organizational structure, the Company’s business segments are:
▪
Risk and Insurance Services, comprising insurance services (Marsh) and reinsurance services (Guy Carpenter); and
▪
Consulting, comprising Mercer and Oliver Wyman Group.
The accounting policies of the segments are the same as those used for the consolidated financial statements described in Note 1 to the Company’s 2015 Form 10-K. Segment performance is evaluated based on segment operating income, which includes directly related expenses, and charges or credits related to integration and restructuring but not the Company’s corporate-level expenses. Revenues are attributed to geographic areas on the basis of where the services are performed.
Selected information about the Company’s operating segments for the three and nine month periods ended September 30, 2016 and 2015 are as follows:
 
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
(In millions)
Revenue
 
Operating
Income
(Loss)
 
Revenue
 
Operating
Income
(Loss)
2016–
 
 
 
 
 
 
 
Risk and Insurance Services
$
1,632

(a) 
$
315

 
$
5,350

(c) 
$
1,340

Consulting
1,513

(b) 
308

 
4,530

(d) 
838

Total Operating Segments
3,145

  
623

 
9,880

  
2,178

Corporate / Eliminations
(10
)
 
(51
)
 
(33
)
 
(147
)
Total Consolidated
$
3,135

  
$
572

 
$
9,847

  
$
2,031

2015–
 
 
 
 
 
 
 
Risk and Insurance Services
$
1,584

(a) 
$
225

 
$
5,137

(c) 
$
1,185

Consulting
1,540

(b) 
285

 
4,448

(d) 
781

Total Operating Segments
3,124

  
510

 
9,585

  
1,966

Corporate / Eliminations
(9
)
 
(49
)
 
(30
)
 
(141
)
Total Consolidated
$
3,115

  
$
461

 
$
9,555

  
$
1,825


(a) 
Includes inter-segment revenue of $1 million and $0 million in 2016 and 2015, respectively, interest income on fiduciary funds of $8 million and $6 million in 2016 and 2015, respectively, and equity method income of $4 million in 2016 and $2 million in 2015, respectively.
(b) 
Includes inter-segment revenue of $9 million in both 2016 and 2015, interest income on fiduciary funds of $1 million in both 2016 and 2015, and equity method income of $5 million in both 2016 and 2015.
(c) 
Includes inter-segment revenue of $5 million in both 2016 and in 2015, interest income on fiduciary funds of $20 million and $16 million in 2016 and 2015, respectively, and equity method income of $11 million and $4 million in 2016 and 2015, respectively.
(d) 
Includes inter-segment revenue of $28 million and $25 million in 2016 and 2015, respectively, interest income on fiduciary funds of $2 million and $3 million in 2016 and 2015, respectively, and equity method income of $14 million and $13 million in 2016 and 2015, respectively.
Details of operating segment revenue for the three and nine month periods ended September 30, 2016 and 2015 are as follows:
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
(In millions)
2016

 
2015

 
2016

 
2015

Risk and Insurance Services
 
 
 
 
 
 
 
Marsh
$
1,370

 
$
1,322

 
$
4,427

 
$
4,230

Guy Carpenter
262

 
262

 
923

 
907

Total Risk and Insurance Services
1,632

 
1,584

 
5,350

 
5,137

Consulting
 
 
 
 
 
 
 
Mercer
1,109

 
1,090

 
3,227

 
3,173

Oliver Wyman Group
404

 
450

 
1,303

 
1,275

Total Consulting
1,513

 
1,540

 
4,530

 
4,448

Total Operating Segments
3,145

 
3,124

 
9,880

 
9,585

Corporate / Eliminations
(10
)
 
(9
)
 
(33
)
 
(30
)
Total
$
3,135

 
$
3,115

 
$
9,847

 
$
9,555