Revenue

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Revenue

RevenueThe core principle of the revenue recognition guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The entity applies the following steps to achieve that principle: identify the contract(s) with the customer, identify the performance obligations in the contract(s), determine

the transaction price, allocate the transaction price to the performance obligations in the contract and recognize revenue when (or as) the entity satisfies a performance obligation. A performance obligation is satisfied either at a “point in time” or “over time” depending on the nature of the product or service provided, and the specific terms of the contract with customers.

The Company's revenue recognition guidance is provided in more detail in Note 2 of the consolidated financial statements and the notes thereto included in Form 10-K for the year ended December 31, 2020.

The following schedule disaggregates components of the Company's revenue:

	Three Months Ended June 30,				Six Months Ended June 30,
(In millions)	2021		2020		2021		2020
Marsh:
EMEA	$	796	$	597	$	1,633	$	1,351
Asia Pacific	347		298		621		536
Latin America	103		99		193		190
Total International	1,246		994		2,447		2,077
U.S./Canada	1,404		1,167		2,528		2,145
Total Marsh	2,650		2,161		4,975		4,222
Guy Carpenter	488		433		1,383		1,260
Subtotal	3,138		2,594		6,358		5,482
Fiduciary interest income	3		9		8		32
Total Risk and Insurance Services	$	3,141	$	2,603	$	6,366	$	5,514
Mercer:
Wealth	$	625	$	561	$	1,248	$	1,153
Health	462		432		949		918
Career	187		156		365		329
Total 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

The Company recognizes commission revenue from arrangements for a significant portion of its brokerage arrangements at a point in time on the effective date of the underlying policy. Commission revenue is estimated using historical information about the risks to be covered over the policy period, some of which are dependent on variable factors such as number of employees covered, covered payroll, airline passenger miles flown, shipped tonnage of marine cargo and others.

The following schedule provides contract assets and contract liabilities information from contracts with customers:

(In millions)	June 30, 2021		December 31, 2020
Contract assets	$	323	$	236
Contract liabilities	$	759	$	676

The Company records accounts receivable when the right to consideration is unconditional, subject only to the passage of time. Contract assets primarily relate to quota share reinsurance brokerage and contingent insurer revenue. The Company does not have the right to bill and collect revenue for quota share brokerage until the underlying policies written by the ceding insurer attach to the treaty. Contract assets are included in other current assets in the Company's consolidated balance sheets. Contract liabilities primarily relate to the advance consideration received from customers. Contract liabilities are included in current liabilities in the Company's consolidated balance sheets. Revenue recognized in the first six months of 2021 and 2020 that was included in the contract liability balance at the beginning of each of those years was $380 million and $418 million, respectively.

The amount of revenue recognized in the first six months of 2021 and 2020 from performance obligations satisfied in previous periods, mainly due to variable consideration from contracts with insurers, quota share business and consulting contracts previously considered constrained was $72 million and $67 million, respectively.

The Company applies the practical expedient and does not disclose the value of unsatisfied performance obligations for (1) contracts with original contract terms of one year or less and (2) contracts where the Company has the right to invoice for services performed. The revenue expected to be recognized in future periods during the non-cancellable term of existing contracts greater than one year that is related to performance obligations that are unsatisfied or partially satisfied at the end of the reporting period is approximately $56 million for Marsh, $178 million for Mercer and $1 million for Oliver Wyman Group. The Company expects revenue in 2022, 2023, 2024, 2025 and 2026 and beyond of $128 million, $68 million, $28 million, $8 million and $3 million, respectively, related to these performance obligations.