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Revenue (Tables) | 6 Months Ended
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Jun. 30, 2024
Revenue from Contract with Customer [Abstract] |
Summary of Revenue by Major Customer Category | The table below summarizes the major service categories from which the Company derives its revenues:
| Three Months Ended June 30, |  | Six Months Ended June 30,
(in millions) | 2024 |  | 2023 |  | 2024 |  | 2023
Certification Testing | $ | 203 |  |  | $ | 188 |  |  | $ | 379 |  |  | $ | 349 |
Ongoing Certification Services | 234 |  |  | 217 |  |  | 467 |  |  | 436 |
Non-certification Testing and Other Services | 225 |  |  | 216 |  |  | 419 |  |  | 398 |
Software | 68 |  |  | 68 |  |  | 135 |  |  | 135 |
Total | $ | 730 |  |  | $ | 689 |  |  | $ | 1,400 |  |  | $ | 1,318 |

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- Definition Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-40 + Details
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