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Basis Of Presentation Derivative Instruments (Details) - Interest Rate Swap - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Derivative [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 450 |  | $ 450 |  |
Derivative Amount, Terminated | 550 |  | 550 |  |
Not Designated as Hedging Instrument |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | (5) | $ (1) | (40) | $ (8) |
Not Designated as Hedging Instrument | Other Current Assets |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Other current assets | 1 |  | 1 |  | $ 0
Not Designated as Hedging Instrument | Other current and non-current liabilities |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Interest rate swap contract - other current and non-current liabilities | $ 0 |  | $ 0 |  | $ 46

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