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Convertible Preferred Stock (Details) (USD $) | 3 Months Ended
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Mar. 31, 2012
Convertible Preferred Stock [Abstract] |
Convertible preferred stock, interest rate, stated percentage | 5.25%
Convertible Preferred Stock, Prior Conversion Ratio | 74.4500
Convertible Preferred Stock, Current Conversion Ratio | 75.3568
Convertible Preferred Stock, Prior Conversion Price | $ 13.43
Convertible Preferred Stock, Current Conversion Price | $ 13.27

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- Details
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- Definition The price per share of the conversion feature embedded in the convertible preferred stock instrument. + References No definition available. + Details
Name: | ipg_ConvertiblePreferredStockConversionPrice
Namespace Prefix: | ipg_
Data Type: | num:perShareItemType
Balance Type: | na
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- Definition Before the adjustment for payment of cash dividends, the price per share of the conversion feature embedded in the convertible preferred stock instrument. + References No definition available. + Details
Name: | ipg_ConvertiblePreferredStockConversionPriceBeforeAdjustmentForDividends
Namespace Prefix: | ipg_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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- Definition The ratio applied to the preferred stock for purposes of determining the number of shares of common stock into which the preferred stock will be converted. + References No definition available. + Details
Name: | ipg_ConvertiblePreferredStockConversionRatio
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- Definition Prior to the adjustment as a result of the cumulative effect of cash dividends on common stock, the previous ratio applied to the preferred stock for purposes of determining the number of shares of common stock into which the preferred stock will be converted. + References No definition available. + Details
Name: | ipg_ConvertiblePreferredStockConversionRatioBeforeAdjustmentForDividends
Namespace Prefix: | ipg_
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- Definition Interest rate stated in convertible preferred stock agreement. + References No definition available. + Details
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Data Type: | num:percentItemType
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Period Type: | instant