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Income Taxes (Details 4) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| Summarization of activity in our gross unrecognized tax benefits | |||
| Balance at beginning of year | $ 222.8 | $ 242.2 | $ 611.9 |
| Additions due to the acquisition of Allied | 13.3 | ||
| Additions due to the acquisition of Allied | 2.8 | 3.9 | |
| Additions for tax positions of prior years | 0.6 | 7.5 | 5.6 |
| Reductions for tax positions of prior years | (162.2) | (7.4) | (24.1) |
| Reductions for tax positions resulting from lapse of statute of limitations | (10.4) | (0.5) | |
| Settlements | (6.9) | (11.9) | (367.9) |
| Balance at end of year | $ 54.3 | $ 222.8 | $ 242.2 |
| X | ||||||||||
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- Definition
Unrecognized tax benefits increases resulting from acquisition. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The gross amount of increases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The gross amount of decreases in unrecognized tax benefits resulting from lapses of the applicable statutes of limitations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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