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Provision for Income Taxes | 12 Months Ended
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Dec. 31, 2019
Provision for Income Taxes [Abstract] |
Provision for Income Taxes | Note 16. Provision for Income Taxes Publicly traded partnerships like ours are treated as corporations unless they have 90% or more in “qualifying income” (as that term is defined in the Internal Revenue Code). We satisfied this requirement in each of the years ended December 31, 2019, 2018 and 2017 and, as a result, are not subject to federal income tax. However, our partners are individually responsible for paying federal income tax on their share of our taxable income. Net earnings for financial reporting purposes may differ significantly from taxable income reportable to our unitholders as a result of differences between the tax basis and financial reporting basis of certain assets and liabilities and other factors. We do not have access to information regarding each partner’s individual tax basis in our limited partner interests. Provision for income taxes primarily reflects our state tax obligations under the Revised Texas Franchise Tax (the “Texas Margin Tax”). Deferred income tax assets and liabilities are recognized for temporary differences between the assets and liabilities of our tax paying entities for financial reporting and tax purposes. Our federal, state and foreign income tax provision (benefit) is summarized below:
|  | For the Year Ended December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
Current portion of income tax provision (benefit): |  |  |  |  |  |  |  |  |
Federal |  | $ | (1.3 | ) |  | $ | 5.3 |  |  | $ | 0.1 |
State |  |  | 25.7 |  |  |  | 33.1 |  |  |  | 18.5 |
Foreign |  |  | 1.2 |  |  |  | 0.5 |  |  |  | 1.0 |
Total current portion |  |  | 25.6 |  |  |  | 38.9 |  |  |  | 19.6 |
Deferred portion of income tax provision (benefit): |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | 1.6 |  |  |  | (0.3 | ) |  |  | (1.8 | )
State |  |  | 18.5 |  |  |  | 21.7 |  |  |  | 7.9 |
Foreign |  |  | (0.1 | ) |  |  | – |  |  |  | – |
Total deferred portion |  |  | 20.0 |  |  |  | 21.4 |  |  |  | 6.1 |
Total provision for income taxes |  | $ | 45.6 |  |  | $ | 60.3 |  |  | $ | 25.7 |
A reconciliation of the provision for income taxes with amounts determined by applying the statutory U.S. federal income tax rate to income before income taxes is as follows:
|  | For the Year Ended December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
Pre-Tax Net Book Income (“NBI”) |  | $ | 4,732.7 |  |  | $ | 4,298.8 |  |  | $ | 2,881.3 |
Texas Margin Tax (1) |  | $ | 44.2 |  |  | $ | 54.8 |  |  | $ | 26.4 |
State income taxes (net of federal benefit) |  |  | 0.5 |  |  |  | 0.2 |  |  |  | 0.5 |
Federal income taxes computed by applying the federal statutory rate to NBI of corporate entities |  |  | 0.9 |  |  |  | 2.1 |  |  |  | 0.1 |
Other permanent differences |  |  | – |  |  |  | 3.2 |  |  |  | (1.3 | )
Provision for income taxes |  | $ | 45.6 |  |  | $ | 60.3 |  |  | $ | 25.7 |
Effective income tax rate |  |  | 1.0 | % |  |  | 1.4 | % |  |  | 0.9 | %
(1) | Although the Texas Margin Tax is not considered a state income tax, it has the characteristics of an income tax since it is determined by applying a tax rate to a base that considers our Texas-sourced revenues and expenses.
The following table presents the significant components of deferred tax assets and deferred tax liabilities at the dates indicated:
|  | December 31, |
|  | 2019 |  |  | 2018 |
Deferred tax liabilities: |  |  |  |  |  |
Attributable to property, plant and equipment |  | $ | 100.2 |  |  | $ | 80.8 |
Attributable to investments in partnerships |  |  | 3.3 |  |  |  | 2.3 |
Total deferred tax liabilities |  |  | 103.5 |  |  |  | 83.1 |
Less deferred tax assets: |  |  |  |  |  |  |  |
Net operating loss carryovers (1) |  |  | 0.1 |  |  |  | 0.1 |
Temporary differences related to Texas Margin Tax |  |  | 3.0 |  |  |  | 2.6 |
Total deferred tax assets |  |  | 3.1 |  |  |  | 2.7 |
Total net deferred tax liabilities |  | $ | 100.4 |  |  | $ | 80.4 |
(1) | These losses expire in various years between 2020 and 2037 and are subject to limitations on their utilization.
Accounting guidance provides that a tax benefit from an uncertain tax position may be recognized when it is more likely than not that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, based on the technical merits. We did not rely on any uncertain tax positions in recording our income tax-related amounts during the years ended December 31, 2019, 2018 or 2017.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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