Intangible Assets

9 Months Ended

Sep. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

The carrying amount of goodwill at September 30, 2017 and December 31, 2016 allocated by domestic and foreign operations is as follows (in millions):


At September 30, 2017	Brokerage		Risk Management		Corporate		Total

United States	$	2,285.5	$	25.8	$	—	$	2,311.3
United Kingdom		738.3		7.3		—		745.6
Canada		345.9		—		—		345.9
Australia		427.8		—		—		427.8
New Zealand		216.8		9.9		—		226.7
Other foreign		100.2		—		2.9		103.1

Total goodwill - net	$	4,114.5	$	43.0	$	2.9	$	4,160.4


At December 31, 2016

United States	$	2,115.0	$	23.5	$	—	$	2,138.5
United Kingdom		662.2		4.3		—		666.5
Canada		292.2		—		—		292.2
Australia		382.7		—		—		382.7
New Zealand		205.0		0.3		—		205.3
Other foreign		79.8		—		2.8		82.6


Total goodwill - net	$	3,736.9	$	28.1	$	2.8	$	3,767.8

The changes in the carrying amount of goodwill for the nine-month period ended September 30, 2017 are as follows (in millions):


	Brokerage		Risk Management		Corporate		Total

Balance as of December 31, 2016	$	3,736.9	$	28.1	$	2.8	$	3,767.8
Goodwill acquired during the period		214.0		14.1		—		228.1
Goodwill adjustments due to appraisals and other acquisition adjustments		14.4		—		—		14.4
Foreign currency translation adjustments during the period		149.2		0.8		0.1		150.1


Balance as of September 30, 2017	$	4,114.5	$	43.0	$	2.9	$	4,160.4

Major classes of amortizable intangible assets at September 30, 2017 and December 31, 2016 consist of the following (in millions):


	September 30,			December 31,
	2017			2016

Expiration lists	$	3,025.8		$	2,757.6
Accumulated amortization - expiration lists		(1,365.9	)		(1,143.0	)

		1,659.9			1,614.6

Non-compete agreements		53.3			49.3
Accumulated amortization - non-compete agreements		(45.7	)		(42.1	)

		7.6			7.2

Trade names		26.2			24.0
Accumulated amortization - trade names		(22.5	)		(18.5	)

		3.7			5.5

Net amortizable assets	$	1,671.2		$	1,627.3


Estimated aggregate amortization expense for each of the next five years is as follows:
2017 (remaining three months)	$	65.4
2018		253.8
2019		239.5
2020		222.8
2021		198.7


Total	$	980.2

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

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