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Acquisitions and Related Transactions Acquisitions (Schedule of Discontinued Operations) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Disposal Group, Including Discontinued Operations, Loss on Debt Extinguishment     $ 20
Disposal Group, Including Discontinued Operation, Revenue     349
Disposal Group, Including Discontinued Operation, Costs of Goods Sold     305
Disposal Group, Including Discontinued Operation, Operating Expense     61
Disposal Group, Including Discontinued Operation, General and Administrative Expense     7
Disposal Group, Including Discontinued Operations, Total Costs and Expenses     373
Disposal Group, Including Discontinued Operation, Operating Income (Loss)     (24)
Disposal Group, Including Discontinued Operation, Interest Expense     2
Disposal Group, Including Discontinued Operation, Other Expense     61
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax     (107)
Discontinued Operation, Tax Effect of Discontinued Operation     158
Loss from discontinued operations $ 0 $ 0 (265)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent     $ (10)