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Assets Held for Sale (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Assets held for sale | $ 768 | $ 1,101
Disposal Group, Held-for-sale or Disposed of by Sales, Not Discontinued Operations |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Assets held for sale | $ 768 |

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- Details
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