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Details of Certain Consolidated Balance Sheet Captions (Retirement Obligations and Other Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Details of Certain Consolidated Balance Sheet Captions [Abstract] |  |
Pension and postretirement benefits | $ 188,999 | $ 225,994
Deferred taxes | 9,169 | 85,824
Operating lease liabilities | 166,786 | 176,246
Legal and environmental | 86,561 | 101,203
Uncertain tax positions and other tax liabilities | 37,013 | 50,259
Other | 30,320 | 54,286
Retirement obligations and other liabilities | $ 518,848 | $ 693,812

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