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INCOME TAXES: (Tables) | 3 Months Ended
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Mar. 31, 2012
INCOME TAXES: |
Schedule of income tax provision and effective income tax rate |
|  | 2012 |  | 2011 |
Income tax provision |  | $ | 318.8 |  | $ | 238.1 |
Effective income tax rate |  | 33.9 | % | 33.1 | %

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- Definition Disclosure of the income tax provision attributable to continuing operations and the effective income tax rate. + References No definition available. + Details
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