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Revenue (Tables) | 6 Months Ended
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Jun. 30, 2022
Disaggregation of Revenue [Line Items] |
Work in Process and Contract Liabilities | Work in process and contract liabilities were (in millions):
| June 30, 2022 |  | December 31, 2021 |  | June 30, 2021
Work in process: |  |  |  |  |
Contract assets and unbilled fees and costs | $ | 647.4 |  |  | $ | 469.9 |  |  | $ | 577.5 |
Media and production costs | 588.5 |  |  | 731.1 |  |  | 540.1 |
| $ | 1,235.9 |  |  | $ | 1,201.0 |  |  | $ | 1,117.6 |
Contract liabilities: |  |  |  |  |
Customer advances | $ | 1,372.8 |  |  | $ | 1,644.5 |  |  | $ | 1,287.2 |
Geographic Markets [Member] |
Disaggregation of Revenue [Line Items] |
Disaggregation of Revenue | Revenue in our principal geographic markets was (in millions):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Americas: |  |  |  |  |  |  |
North America | $ | 1,969.5 |  |  | $ | 1,957.4 |  |  | $ | 3,808.5 |  |  | $ | 3,929.9 |
Latin America | 79.9 |  |  | 70.4 |  |  | 147.6 |  |  | 133.7 |
EMEA: |  |  |  |  |  |  |
Europe | 1,024.9 |  |  | 1,044.1 |  |  | 2,016.9 |  |  | 1,985.1 |
Middle East and Africa | 64.9 |  |  | 52.3 |  |  | 146.8 |  |  | 102.5 |
Asia-Pacific | 428.0 |  |  | 447.4 |  |  | 857.7 |  |  | 847.4 |
| $ | 3,567.2 |  |  | $ | 3,571.6 |  |  | $ | 6,977.5 |  |  | $ | 6,998.6 |
Discipline [Member] |
Disaggregation of Revenue [Line Items] |
Disaggregation of Revenue | Revenue by discipline was (in millions):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Advertising & Media | $ | 1,831.0 |  |  | $ | 2,014.5 |  |  | $ | 3,600.4 |  |  | $ | 4,018.2 |
Precision Marketing | 362.0 |  |  | 293.6 |  |  | 698.1 |  |  | 563.0 |
Commerce & Brand Consulting | 234.6 |  |  | 221.5 |  |  | 472.5 |  |  | 436.1 |
Experiential | 154.6 |  |  | 124.0 |  |  | 297.1 |  |  | 212.4 |
Execution & Support | 250.5 |  |  | 250.9 |  |  | 504.8 |  |  | 497.5 |
Public Relations | 392.2 |  |  | 345.9 |  |  | 753.1 |  |  | 663.4 |
Healthcare | 342.3 |  |  | 321.2 |  |  | 651.5 |  |  | 608.0 |
| $ | 3,567.2 |  |  | $ | 3,571.6 |  |  | $ | 6,977.5 |  |  | $ | 6,998.6 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130551-203045 + Details
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