Segment Information (Tables)

3 Months Ended

Mar. 31, 2015

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, 2015 and 2014 are as follows:

	Three Months Ended March 31,
(In millions of dollars)	Revenue				Operating Income (Loss)
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
2014–
Risk and Insurance Services	$	1,839		(a)	$	493
Consulting	1,432			(b)	225
Total Operating Segments	3,271				718
Corporate / Eliminations	(7		)		(45		)
Total Consolidated	$	3,264			$	673

^(a)  Includes inter-segment revenue of $1 million and $0 million in 2015and 2014, respectively, interest income on fiduciary funds of $5 million and $6 million in 2015 and 2014, respectively, and equity method income of $2 million and $0 million in 2015 and 2014, respectively.

^(b)  Includes inter-segment revenue of $8 million and $7 million in 2015 and 2014, respectively, interest income on fiduciary funds of $1 million in both 2015 and 2014, and equity method income of $3 million in 2015 and $0 million in 2014.

Details of Operating Segment Revenue

Details of operating segment revenue for the three-month periods ended March 31, 2015 and 2014 are as follows:

	Three Months Ended March 31,
(In millions of dollars)	2015			2014
Risk and Insurance Services
Marsh	$	1,434		$	1,457
Guy Carpenter	369			382
Total Risk and Insurance Services	1,803			1,839
Consulting
Mercer	1,037			1,061
Oliver Wyman Group	384			371
Total Consulting	1,421			1,432
Total Operating Segments	3,224			3,271
Corporate / Eliminations	(9		)	(7		)
Total	$	3,215		$	3,264