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Revenue from Contracts with Customers (Tables) | 6 Months Ended
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Jun. 30, 2021
Revenue from Contract with Customer [Abstract] |
Schedule of Disaggregation of Revenue | The following table summarizes revenue from contracts with customers by principal service line (in millions):
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Commercial Risk Solutions |  | $ | 1,349 |  |  | $ | 1,126 |  |  | $ | 2,638 |  |  | $ | 2,272 |
Reinsurance Solutions |  | 500 |  |  | 448 |  |  | 1,422 |  |  | 1,296 |
Retirement Solutions |  | 440 |  |  | 393 |  |  | 874 |  |  | 790 |
Health Solutions |  | 307 |  |  | 258 |  |  | 843 |  |  | 760 |
Data & Analytic Services |  | 294 |  |  | 274 |  |  | 645 |  |  | 605 |
Elimination |  | (4) |  |  | (2) |  |  | (11) |  |  | (7) |
Total revenue |  | $ | 2,886 |  |  | $ | 2,497 |  |  | $ | 6,411 |  |  | $ | 5,716 |
Consolidated revenue from contracts with customers by geographic area, which is attributed on the basis of where the services are performed, is as follows (in millions):
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
United States |  | $ | 1,263 |  |  | $ | 1,107 |  |  | $ | 2,571 |  |  | $ | 2,334 |
Americas other than United States |  | 268 |  |  | 219 |  |  | 518 |  |  | 447 |
United Kingdom |  | 498 |  |  | 444 |  |  | 1,028 |  |  | 944 |
Ireland |  | 39 |  |  | 21 |  |  | 72 |  |  | 44 |
Europe, Middle East, & Africa other than United Kingdom and Ireland |  | 499 |  |  | 404 |  |  | 1,590 |  |  | 1,359 |
Asia Pacific |  | 319 |  |  | 302 |  |  | 632 |  |  | 588 |
Total revenue |  | $ | 2,886 |  |  | $ | 2,497 |  |  | $ | 6,411 |  |  | $ | 5,716 |
Schedule of Capitalized Contract Cost | An analysis of the changes in the net carrying amount of costs to fulfill contracts with customers are as follows (in millions):
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Balance at beginning of period |  | $ | 241 |  |  | $ | 229 |  |  | $ | 339 |  |  | $ | 335 |
Additions |  | 336 |  |  | 274 |  |  | 682 |  |  | 592 |
Amortization |  | (357) |  |  | (313) |  |  | (800) |  |  | (729) |
Impairment |  | — |  |  | — |  |  | — |  |  | — |
Foreign currency translation and other |  | 2 |  |  | 3 |  |  | 1 |  |  | (5) |
Balance at end of period |  | $ | 222 |  |  | $ | 193 |  |  | $ | 222 |  |  | $ | 193 |
An analysis of the changes in the net carrying amount of costs to obtain contracts with customers are as follows (in millions):
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Balance at beginning of period |  | $ | 185 |  |  | $ | 167 |  |  | $ | 184 |  |  | $ | 171 |
Additions |  | 15 |  |  | 16 |  |  | 28 |  |  | 28 |
Amortization |  | (13) |  |  | (11) |  |  | (25) |  |  | (23) |
Impairment |  | — |  |  | — |  |  | — |  |  | — |
Foreign currency translation and other |  | (12) |  |  | — |  |  | (12) |  |  | (4) |
Balance at end of period |  | $ | 175 |  |  | $ | 172 |  |  | $ | 175 |  |  | $ | 172 |

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- Definition Tabular disclosure of cost capitalized in obtaining or fulfilling contract with customer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123353750&loc=SL49131252-203054 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045 + Details
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