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Income Taxes Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2020
Income Tax Disclosure [Abstract] |
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] | The components of the federal and state income tax expense (benefit) of our taxable subsidiaries were summarized as follows:
| Years Ended December 31,
| 2020 |  | 2019 |  | 2018
Current expense (benefit): |  |  |  |  |
Federal | $ | (6) |  |  | $ | (20) |  |  | $ | (8) |
State | 32 |  |  | (2) |  |  | 19 |
Foreign | 1 |  |  | — |  |  | — |
Total | 27 |  |  | (22) |  |  | 11 |
Deferred expense (benefit): |  |  |  |  |
Federal | 176 |  |  | 174 |  |  | 181 |
State | 41 |  |  | 43 |  |  | (188) |
Foreign | (7) |  |  | — |  |  | — |
Total | 210 |  |  | 217 |  |  | (7) |
Total income tax expense from continuing operations | $ | 237 |  |  | $ | 195 |  |  | $ | 4 |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] | Historically, our effective tax rate has differed from the statutory rate primarily due to partnership earnings that are not subject to United States federal and most state income taxes at the partnership level. A reconciliation of income tax expense at the United States statutory rate to the Partnership’s income tax benefit for the years ended December 31, 2020, 2019 and 2018 is as follows:
| Years Ended December 31,
| 2020 |  |  |  |  |  | 2019 |  | 2018
Income tax expense at United States statutory rate | $ | 79 |  |  |  |  |  |  | $ | 1,054 |  |  | $ | 775 |
Increase (reduction) in income taxes resulting from: |  |  |  |  |  |  |  |  |
Partnership earnings not subject to tax | 88 |  |  |  |  |  |  | (866) |  |  | (647) |
Noncontrolling interests | 16 |  |  |  |  |  |  | — |  |  | — |
State tax, net of federal tax benefit | 58 |  |  |  |  |  |  | 12 |  |  | (125) |
Dividend received deduction | — |  |  |  |  |  |  | (3) |  |  | (5) |
Foreign taxes | (7) |  |  |  |  |  |  | — |  |  | — |
Other | 3 |  |  |  |  |  |  | (2) |  |  | 6 |
Income tax expense from continuing operations | $ | 237 |  |  |  |  |  |  | $ | 195 |  |  | $ | 4 |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] | Deferred taxes result from the temporary differences between financial reporting carrying amounts and the tax basis of existing assets and liabilities. The table below summarizes the principal components of the deferred tax assets (liabilities) as follows:
| December 31,
| 2020 |  | 2019
Deferred income tax assets: |  |  |
Net operating losses, alternative minimum tax credit and other carryforwards | $ | 1,047 |  |  | $ | 936 |
Pension and other postretirement benefits | — |  |  | 7 |
Other | 34 |  |  | 85 |
Total deferred income tax assets | 1,081 |  |  | 1,028 |
Valuation allowance | (134) |  |  | (95) |
Net deferred income tax assets | 947 |  |  | 933 |
Deferred income tax liabilities: |  |  |
Property, plant and equipment | (298) |  |  | (501) |
Investments in affiliates | (3,994) |  |  | (3,547) |
Trademarks | (77) |  |  | (72) |
Other | (6) |  |  | (21) |
Total deferred income tax liabilities | (4,375) |  |  | (4,141) |
Net deferred income taxes | $ | (3,428) |  |  | $ | (3,208) |
ScheduleOfUnrecognizedTaxBenefits [Table Text Block] |
| Years Ended December 31,
| 2020 |  | 2019 |  | 2018
Balance at beginning of year | $ | 94 |  |  | $ | 624 |  |  | $ | 609 |
Additions attributable to tax positions taken in the current year | — |  |  | — |  |  | 8 |
Additions attributable to tax positions taken in prior years | — |  |  | 11 |  |  | 7 |
Reduction attributable to tax positions taken in prior years | — |  |  | (541) |  |  | — |
Lapse of statute | (4) |  |  | — |  |  | — |
Balance at end of year | $ | 90 |  |  | $ | 94 |  |  | $ | 624 |

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