Segment Information (Tables)

3 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Selected Information And Details For MMC's Operating Segments

Selected information about the Company’s operating segments for the three month period ended March 31, 2017 and 2016 are as follows:

	Three Months Ended March 31,
(In millions)	Revenue				Operating Income (Loss)
2017–
Risk and Insurance Services	$	1,989		(a)	$	613
Consulting	1,526			(b)	241
Total Operating Segments	3,515				854
Corporate / Eliminations	(12		)		(45		)
Total Consolidated	$	3,503			$	809
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

^(a)  Includes inter-segment revenue of $1 million in 2016, interest income on fiduciary funds of $8 million and $6 million in 2017 and 2016, respectively, and equity method income of $2 million in 2017 and $1 million in 2016, respectively.

^(b)  Includes inter-segment revenue of $12 million and $9 million in 2017 and 2016, respectively, interest income on fiduciary funds of $1 million in both 2017 and 2016, and equity method income of $4 million in both 2017 and 2016.

Details of Operating Segment Revenue

Details of operating segment revenue for the three month period ended March 31, 2017 and 2016 are as follows:

	Three Months Ended March 31,
(In millions)	2017			2016
Risk and Insurance Services
Marsh	$	1,602		$	1,493
Guy Carpenter	387			375
Total Risk and Insurance Services	1,989			1,868
Consulting
Mercer	1,077			1,039
Oliver Wyman Group	449			439
Total Consulting	1,526			1,478
Total Operating Segments	3,515			3,346
Corporate / Eliminations	(12		)	(10		)
Total	$	3,503		$	3,336