XML 38 R56.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Segment Reporting (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010 | Mar. 31, 2010 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Revenue | $ 3,852.9 | $ 3,380.9 | $ 3,487.4 | $ 3,151.3 | $ 3,586.7 | $ 2,994.6 | $ 3,041.2 | $ 2,920.0 | $ 13,872.5 | $ 12,542.5 | $ 11,720.7
Americas [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 8,018.1 | 7,459.0 | 6,855.0
Long-lived assets and goodwill | 5,960.0 |  |  |  | 5,805.9 |  |  |  | 5,960.0 | 5,805.9 | 5,642.3
EMEA [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 4,491.0 | 4,129.1 | 4,076.5
Long-lived assets and goodwill | 2,614.4 |  |  |  | 2,526.0 |  |  |  | 2,614.4 | 2,526.0 | 2,549.0
Asia/Australia [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 1,363.4 | 954.4 | 789.2
Long-lived assets and goodwill | $ 564.8 |  |  |  | $ 130.5 |  |  |  | $ 564.8 | $ 130.5 | $ 127.2

X
- Definition Long-lived Assets and Goodwill + References No definition available. + Details
Name: | omc_LongLivedAssetsAndGoodwill
Namespace Prefix: | omc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 5 -Section 03 -Paragraph 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration