Segment Information (Tables)

6 Months Ended

Jun. 30, 2021

Segment Reporting [Abstract]

Selected Information And Details For MMC's Operating Segments

Selected information about the Company’s operating segments for the three and six month periods ended June 30, 2021 and 2020 are as follows:

	Three Months Ended June 30,					Six Months Ended June 30,
(In millions)	Revenue			Operating Income (Loss)		Revenue			Operating Income (Loss)
2021–
Risk and Insurance Services	$	3,141	(a)	$	950	$	6,366	(c)	$	2,010
Consulting	1,892		(b)	344		3,765		(d)	705
Total Operating Segments	5,033			1,294		10,131			2,715
Corporate/Eliminations	(16)			(66)		(31)			(129)
Total Consolidated	$	5,017		$	1,228	$	10,100		$	2,586
2020–
Risk and Insurance Services	$	2,603	(a)	$	696	$	5,514	(c)	$	1,550
Consulting	1,616		(b)	255		3,378		(d)	537
Total Operating Segments	4,219			951		8,892			2,087
Corporate/Eliminations	(30)			(66)		(52)			(132)
Total Consolidated	$	4,189		$	885	$	8,840		$	1,955

(a) Includes inter-segment revenue of $4 million in both 2021 and 2020, interest income on fiduciary funds of $3 million and $9 million in 2021 and 2020, respectively, and equity method income of $14 million in both 2021 and 2020.

(b) Includes inter-segment revenue of $12 million and $26 million in 2021 and 2020, respectively.

(c) Includes inter-segment revenue of $4 million and $5 million in 2021 and 2020, respectively, interest income on fiduciary funds of $8 million and $32 million in 2021 and 2020, respectively, and equity method income of $17 million and $13 million in 2021 and 2020, respectively.

(d) Includes inter-segment revenue of $27 million and $47 million in 2021 and 2020, respectively, and equity method income of $4 million in 2020 and none in 2021.

Details of Operating Segment Revenue

Details of operating segment revenue for the three and six-month periods ended June 30, 2021 and 2020 are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
(In millions)	2021		2020		2021		2020
Risk and Insurance Services
Marsh	$	2,652	$	2,168	$	4,981	$	4,244
Guy Carpenter	489		435		1,385		1,270
Total Risk and Insurance Services	3,141		2,603		6,366		5,514
Consulting
Mercer	1,274		1,149		2,562		2,400
Oliver Wyman Group	618		467		1,203		978
Total Consulting	1,892		1,616		3,765		3,378
Total Operating Segments	5,033		4,219		10,131		8,892
Corporate/Eliminations	(16)		(30)		(31)		(52)
Total	$	5,017	$	4,189	$	10,100	$	8,840