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Contracts with Customers (Tables)

12 Months Ended

Dec. 31, 2019

Summary of Unbilled Receivables, Contract Assets and Contract Liabilities from Contracts with Customers

Information about unbilled receivables, contract assets and contract liabilities from contracts with customers is as follows (in millions):

		December 31, 2019				December 31, 2018
Unbilled receivables		$	556.4			$	496.2
Deferred contract costs			98.3				91.6
Deferred revenue			503.8				457.7

Summary of Changes in Deferred Revenue Balances

Significant changes in the deferred revenue balances, which include foreign currency translation adjustments, during the period are as follows (in millions):

		Brokerage				Risk Management				Total
Deferred revenue at December 31, 2017		$	258.7			$	171.9			$	430.6
Incremental deferred revenue			244.0				138.1				382.1
Revenue recognized during the year ended December 31, 2018 included in deferred revenue at December 31, 2017			(236.5	)			(137.0	)			(373.5	)
Deferred revenue recognized from business acquisitions			18.5				—				18.5
Deferred revenue at December 31, 2018			284.7				173.0				457.7
Incremental deferred revenue			276.2				136.9				413.1
Revenue recognized during the year ended December 31, 2019 included in deferred revenue at December 31, 2018			(254.3	)			(143.3	)			(397.6	)
Deferred revenue recognized from business acquisitions			30.6				—				30.6
Deferred revenue at December 31, 2019		$	337.2			$	166.6			$	503.8

Summary of Expected Revenue Related to Performance Obligations

The estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially unsatisfied) at the end of the reporting period is as follows (in millions):

		Brokerage				Risk Management				Total
2020		$	309.6			$	93.2			$	402.8
2021			23.6				33.8				57.4
2022			1.8				15.7				17.5
2023			1.1				8.5				9.6
2024			0.5				4.9				5.4
Thereafter			0.6				10.5				11.1
Total		$	337.2			$	166.6			$	503.8

X

- Definition

Contract with customer, liability

+ References

No definition available.

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- Definition

Tabular disclosure of contract balances and changes in contract balances.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130551-203045

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X

- Definition

Tabular disclosure of expected timing for satisfying remaining performance obligation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130556-203045

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