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Basis of Presentation (Narrative) (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
May 31, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Jul. 30, 2021 | Dec. 31, 2020 | Apr. 30, 2020
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit balance |  | $ 13,509,000,000 |  | $ 13,509,000,000 |  |  |  |
Immaterial amount and a loss |  |  |  | 0 | $ 5,000,000 |  |  |
Investments |  | 70,000,000 |  | 70,000,000 |  |  | $ 63,000,000 |
Equity method investment |  | 6,000,000 | $ 3,000,000 | 8,000,000 | 4,000,000 |  |  |
Equity securities without readily determinable fair value, amount |  | 8,000,000 |  | 8,000,000 |  |  | $ 8,000,000 |
Royalty fee |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Revenue |  | $ 34,000,000 | $ 30,000,000 | 93,000,000 | $ 84,000,000 |  |  |
Disposed of by Sale |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Amount of consideration received | $ 4,000,000 |  |  |  |  |  |  |
Disposed of by Sale | Assets In Argentina |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Consideration, rights to operate period | 2 years |  |  |  |  |  |  |
Loss on sale |  |  |  | 14,000,000 |  |  |  |
Severance costs |  |  |  | $ 1,000,000 |  |  |  |
Term loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  | $ 1,200,000,000
Line of Credit | Revolving Credit Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit balance |  |  |  |  |  | $ 1,950,000,000 |  | $ 1,800,000,000

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