Revenue (Tables)

3 Months Ended

Mar. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

Oliver Wyman typically bills its clients 30-60 days in arrears with payment due upon receipt of the invoice.

Health brokerage and consulting services are components of both Marsh, which includes MMA, and Mercer, with approximately 70% of such revenues reported in Mercer. Health contracts typically involve a series of distinct services that are treated as a single performance obligation. Revenue for these services is recognized over time based on the amount of remuneration the Company expects to be entitled in exchange for these services. Payments for health brokerage and consulting services are typically paid monthly in arrears from carriers based on insured lives under the contract.

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

	Three Months Ended March 31,
	2018
Marsh:
EMEA	$	643
Asia Pacific	164
Latin America	84
Total International	891
U.S./Canada	803
Total Marsh	1,694
Guy Carpenter	637
Subtotal	2,331
Fiduciary interest income	13
Total Risk and Insurance Services	$	2,344
Mercer:
Defined Benefit Consulting & Administration	$	339
Investment Management & Related Services	226
Total Wealth	565
Health	442
Career	164
Total Mercer	1,171
Oliver Wyman	497
Total Consulting	$	1,668

Contract with Customer, Asset and Liability

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

(In millions)	January 1, 2018		March 31, 2018
Contract Assets	$	128	$	169
Contract Liabilities	$	583	$	657

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

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 $24 million for Marsh, $575 million for Mercer and $8 million for Oliver Wyman. The Company expects revenue in 2019, 2020, 2021, 2022 and 2023 and beyond of $284 million, $155 million, $94 million, $47 million and $27 million, respectively, related to these performance obligations.