Segment Information (Tables)

3 Months Ended

Mar. 31, 2016

Segment Reporting [Abstract]

Selected Information And Details For MMC's Operating Segments

Selected information about the Company’s operating segments for the three-month periods ended March 31, 2016 and 2015 are as follows:

	Three Months Ended March 31,
(In millions of dollars)	Revenue				Operating Income (Loss)
2016–
Risk and Insurance Services	$	1,868		(a)	$	535
Consulting	1,478			(b)	245
Total Operating Segments	3,346				780
Corporate / Eliminations	(10		)		(47		)
Total Consolidated	$	3,336			$	733
2015–
Risk and Insurance Services	$	1,803		(a)	$	533
Consulting	1,421			(b)	248
Total Operating Segments	3,224				781
Corporate / Eliminations	(9		)		(46		)
Total Consolidated	$	3,215			$	735

^(a)  Includes inter-segment revenue of $1 million in both 2016 and 2015, interest income on fiduciary funds of $6 million in 2016 and $5 million in 2015, and equity method income of $1 million in 2016 and $2 million in 2015.

^(b)  Includes inter-segment revenue of $9 million in 2016 and $8 millionin2015, interest income on fiduciary funds of $1 millionin both 2016 and 2015, and equity method income of $4 million in 2016 and $3 million in 2015.

Details of Operating Segment Revenue

Details of operating segment revenue for the three-month periods ended March 31, 2016 and 2015 are as follows:

	Three Months Ended March 31,
(In millions of dollars)	2016			2015
Risk and Insurance Services
Marsh	$	1,493		$	1,434
Guy Carpenter	375			369
Total Risk and Insurance Services	1,868			1,803
Consulting
Mercer	1,039			1,037
Oliver Wyman Group	439			384
Total Consulting	1,478			1,421
Total Operating Segments	3,346			3,224
Corporate / Eliminations	(10		)	(9		)
Total	$	3,336		$	3,215