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v2.4.1.9

Debt and Credit Agreements Convertible Notes (Details) (4.75% Convertible Notes, USD $) Share data in Millions, unless otherwise specified | 12 Months Ended |
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Dec. 31, 2013 | Mar. 31, 2013
4.75% Convertible Notes |  |
Debt Conversion [Line Items] |  |
Interest Rate, Stated Percentage | 4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = ipg_ConvertibleDebt2Member |
Debt Instrument, Face Amount | $ 200,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = ipg_ConvertibleDebt2Member |
Debt Conversion Rate | 84.3402ipg_DebtConversionRate / us-gaap_LongtermDebtTypeAxis = ipg_ConvertibleDebt2Member |
Principal Amount Converted into Stock |  | $ 199.997ipg_Principalamountconvertedintostock / us-gaap_LongtermDebtTypeAxis = ipg_ConvertibleDebt2Member
Conversion of Stock, Shares Issued | 16.9us-gaap_ConversionOfStockSharesIssued1 / us-gaap_LongtermDebtTypeAxis = ipg_ConvertibleDebt2Member |
Net Share Settlement | 1.5ipg_NetShareSettlement / us-gaap_LongtermDebtTypeAxis = ipg_ConvertibleDebt2Member |

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- Definition The conversion rate of shares per $ principal amount of the note, as a result of exercising a call option to convert the notes in common stock. + References No definition available. + Details
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- Definition Value in shares of a net share settlement from option counterparties. This is a result of exercising capped call options to hedge the risk of price appreciation on shares of common stock into which convertible notes are convertible. + References No definition available. + Details
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- Definition Principal amount converted into stock + References No definition available. + Details
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- Definition The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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