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Goodwill and Other Intangibles | 3 Months Ended
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Mar. 31, 2018
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. As part of its assessment, the Company considers numerous factors, including that the fair value of each reporting unit exceeds its carrying value by a substantial margin based on its most recent estimates, 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 2017 and concluded that a two-step goodwill impairment test was not required in 2017 and that goodwill was not impaired. Changes in the carrying amount of goodwill are as follows:
March 31, |  |  |
(In millions) | 2018 |  |  | 2017 |
Balance as of January 1, | $ | 9,089 |  |  | $ | 8,369 |
Goodwill acquired | 15 |  |  | 363 |
Other adjustments(a) | 90 |  |  | 37 |
Balance at March 31, | $ | 9,194 |  |  | $ | 8,769 |
(a) The increase in 2018 primarily reflects the impact of foreign exchange. Goodwill allocable to the Company’s reportable segments at March 31, 2018 is as follows: Risk and Insurance Services, $6.5 billion and Consulting, $2.7 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 March 31, 2018 and December 31, 2017 are as follows:
| March 31, 2018 |  | December 31, 2017
(In millions) | Gross Cost |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Gross Cost |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
Client Relationships | $ | 1,700 |  |  | $ | 560 |  |  | $ | 1,140 |  |  | $ | 1,672 |  |  | $ | 518 |  |  | $ | 1,154 |
Other (a) | 241 |  |  | 125 |  |  | 116 |  |  | 234 |  |  | 114 |  |  | 120 |
Amortized intangibles | $ | 1,941 |  |  | $ | 685 |  |  | $ | 1,256 |  |  | $ | 1,906 |  |  | $ | 632 |  |  | $ | 1,274 |
(a) Primarily non-compete agreements, trade names and developed technology. Aggregate amortization expense for the three months ended March 31, 2018 and 2017 was $45 million and $40 million, respectively. The estimated future aggregate amortization expense is as follows:
For the Years Ending December 31, |
(In millions) | Estimated Expense |
2018 (excludes amortization through March 31, 2018) | $ | 137 |
2019 | 174 |
2020 | 154 |
2021 | 145 |
2022 | 132 |
Subsequent years | 514 |
| $ | 1,256 |

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- 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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