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Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Income Tax Disclosure [Abstract] |  |  |  |
(Benefit) Provision for income taxes | $ (456,754) | $ 22,080 | $ (415,805) | $ 46,811
Discrete tax (benefit) expense | (465,300) | $ 1,700 | (445,800) | $ 11,400
Release of valuation allowances on deferred tax assets | 492,200 |  |  |
Reasonably possible changes to unrecognized tax benefits related to settlement of tax audits and/or expiration of statutes of limitations within the next twelve months | 32,000 |  | 32,000 |
Deferred tax liabilities, undistributed foreign earnings | 1,000 |  | 1,000 |
Undistributed earnings of foreign subsidiaries | $ 3,500,000 |  | $ 3,500,000 |

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