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Segment Reporting | 12 Months Ended
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Dec. 31, 2017
Segment Reporting [Abstract] |
Segment Reporting | Segment Reporting Our five branded agency networks operate in the advertising, marketing and corporate communications services industry, and are organized into agency networks, virtual client networks, regional reporting units and operating groups. Our networks, virtual client networks and agencies increasingly share clients and provide clients with integrated services. The main economic components of each agency are employee compensation and related costs and direct service costs and occupancy and other costs which include rent and occupancy costs, technology costs and other overhead expenses. Therefore, given these similarities, we aggregate our operating segments, which are our five agency networks, into one reporting segment. The agency networks' regional reporting units comprise three principal regions; the Americas, EMEA and Asia Pacific. The regional reporting units monitor the performance and are responsible for the agencies in their region. Agencies within the regional reporting units serve similar clients in similar industries and in many cases the same clients and have similar economic characteristics. Revenue and long-lived assets and goodwill by geographic region at and for the three years ended December 31, 2017 were (in millions):
| Americas |  | EMEA |  | Asia Pacific
2017 |  |  |  |  |
Revenue | $ | 9,180.8 |  |  | $ | 4,442.5 |  |  | $ | 1,650.3 |
Long-lived assets and goodwill | 6,633.8 |  |  | 2,840.8 |  |  | 553.8 |
2016 |  |  |  |  |
Revenue | $ | 9,597.6 |  |  | $ | 4,183.1 |  |  | $ | 1,636.2 |
Long-lived assets and goodwill | 6,662.7 |  |  | 2,469.1 |  |  | 519.1 |
2015 |  |  |  |  |
Revenue | $ | 9,359.0 |  |  | $ | 4,203.5 |  |  | $ | 1,571.9 |
Long-lived assets and goodwill | 6,103.4 |  |  | 2,737.8 |  |  | 527.9 |
The Americas comprises North America, which includes the United States, Canada and Puerto Rico, and Latin America, which includes Mexico. EMEA comprises Europe, the Middle East and Africa. Asia Pacific comprises Australia, China, India, Japan, Korea, New Zealand, Singapore and other Asian countries. Revenue in the United States was $8,196.9 million, $8,627.8 million and $8,526.7 million in 2017, 2016 and 2015, respectively. The reduction in revenue in 2017 for North America and the United States primarily reflects the sale of our specialty print media business in the second quarter.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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