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Revenue (Tables)
 3 Months Ended
Mar. 31, 2022
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
The following table disaggregates components of the Company's revenue:
Three Months Ended
March 31,
(In millions)20222021
Marsh:
EMEA$842 $837 
Asia Pacific321 274 
Latin America104 90 
Total International1,267 1,201 
U.S./Canada1,279 1,124 
Total Marsh2,546 2,325 
Guy Carpenter999 895 
 Subtotal3,545 3,220 
Fiduciary interest income4 5 
Total Risk and Insurance Services$3,549 $3,225 
Mercer:
Wealth$617 $623 
Health524 487 
Career202 178 
Total Mercer1,343 1,288 
Oliver Wyman Group667 585 
Total Consulting$2,010 $1,873 
Contract with Customer, Asset and Liability
The following table provides contract assets and contract liabilities information from contracts with customers:
(In millions)March 31, 2022December 31, 2021
Contract assets$357 $290 
Contract liabilities$824 $776