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Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Net operating loss carryforward | $ 105 | $ 209
Credit carryforward | 25 | 25
Operating lease liabilities | 113 | 96
Accruals | 63 | 65
Pension | 90 | 83
Inventories | 13 | 20
Other | 43 | 26
Deferred taxes assets—total | 452 | 524
Property, plant and equipment | (1,080) | (1,017)
Intangibles | (137) | (156)
Operating lease right-of-use asset | (112) | (95)
Turnaround costs | (17) | (21)
Consolidated partnerships | (181) | (194)
Equity method investments | (227) | (220)
Other | (18) | (18)
Deferred tax liabilities—total | (1,772) | (1,721)
Valuation allowance | (33) | (30)
Total net deferred tax liabilities | (1,353) | (1,227)
Balance sheet classifications |  |
Noncurrent deferred tax asset | 15 | 28
Noncurrent deferred tax liability | $ (1,368) | $ (1,255)

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