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Goodwill and Other Intangibles
6 Months Ended
Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangibles
Goodwill and Other Intangibles
The Company is required to assess goodwill and any indefinite-lived intangible assets for impairment annually, or more frequently if circumstances indicate impairment may have occurred. The Company performs the annual impairment assessment for each of its reporting units during the third quarter of each year. In accordance with applicable accounting guidance, the Company assesses qualitative factors to determine whether it is necessary to perform the two-step goodwill impairment test. The Company considers numerous factors, which include whether the fair value of each reporting unit exceeded its carrying value by a substantial margin in its most recent estimate of reporting unit fair values, whether significant acquisitions or dispositions occurred which might alter the fair value of its reporting units, macroeconomic conditions and their potential impact on reporting unit fair values, actual performance compared with budget and prior projections used in its estimation of reporting unit fair values, industry and market conditions, and the year-over-year change in the Company’s share price. The Company completed its qualitative assessment in the third quarter of 2016 and concluded that a two-step goodwill impairment test was not required in 2016 and that goodwill was not impaired.
Changes in the carrying amount of goodwill are as follows:
June 30,
 
 
 
(In millions)
2017

 
2016

Balance as of January 1, as reported
$
8,369

 
$
7,889

Goodwill acquired
370

 
62

Other adjustments(a)
82

 
(6
)
Balance at June 30,
$
8,821

 
$
7,945


(a) 
The increase in 2017 primarily reflects the impact of foreign exchange.
Goodwill allocable to the Company’s reportable segments at June 30, 2017 is as follows: Risk and Insurance Services, $6.3 billion and Consulting, $2.5 billion.
Other intangible assets that are not deemed to have an indefinite life are amortized over their estimated lives and reviewed for impairment upon the occurrence of certain triggering events in accordance with applicable accounting literature.
The gross cost and accumulated amortization at June 30, 2017 and December 31, 2016 are as follows:
  
June 30, 2017
 
December 31, 2016
(In millions)
Gross
Cost

 
Accumulated
Amortization

 
Net
Carrying
Amount

 
Gross
Cost

 
Accumulated
Amortization

 
Net
Carrying
Amount

Client Relationships
$
1,581

 
$
453

 
$
1,128

 
$
1,390

 
$
392

 
$
998

Other (a)
198

 
93

 
105

 
204

 
76

 
128

 Amortized intangibles
$
1,779

 
$
546

 
$
1,233

 
$
1,594

 
$
468

 
$
1,126


(a) Primarily non-compete agreements, trade names and developed technology.
Aggregate amortization expense for the six months ended June 30, 2017 and 2016 was $80 million and $67 million, respectively. The estimated future aggregate amortization expense is as follows:
For the Years Ending December 31,
 
(In millions)
Estimated Expense

2017 (excludes amortization through June 30, 2017)
$
85

2018
158

2019
149

2020
127

2021
118

Subsequent years
596

 
$
1,233