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Income Taxes (Notes) | 3 Months Ended
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Mar. 31, 2019
Income Tax Disclosure [Abstract] |
Income Tax Disclosure [Text Block] | Income Taxes At the end of each interim period, we estimate our annual effective tax rate and apply that rate to our interim earnings. We also record the tax impact of certain unusual or infrequently occurring items, including changes in judgment about valuation allowances and the effects of changes in tax laws or rates, in the interim period in which they occur. The computation of the annual estimated effective tax rate at each interim period requires certain estimates and significant judgment including, but not limited to, the expected operating income for the year, projections of the proportion of income earned and taxed in state and foreign jurisdictions, permanent and temporary differences between book and taxable income, and the likelihood of recovering deferred tax assets generated in the current year. The accounting estimates used to compute the provision for income taxes may change as new events occur, additional information is obtained or as the tax environment changes. Our effective income tax rate for the three months ended March 31, 2019 was 27.1%, compared to 24.7% for the comparable prior year period. The increase was primarily attributable to the impact of a favorable discrete item of approximately $3 million for the three months ended March 31, 2018, for excess tax benefits from stock-based payments; there was an immaterial amount for the three months ended March 31, 2019. The year over year change for this discrete item increased the effective tax rate by 1.3% compared to the prior year period, while the remaining discrete items increased the effective tax rate by an immaterial amount compared to the prior year period. The effective tax rate increase was also due to an approximately 1.0% increase in the effective tax rate as a result of the Stahlgruber acquisition, including the higher effective tax rate in Germany and the impact of suspended interest deductions due to thin capitalization constraints.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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