Basis of Presentation (Narrative) (Details) $ in Millions |
Jun. 30, 2021
USD ($)
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| Basis of Presentation [Abstract] | |
| Cash and cash equivalents and marketable securities | $ 97 |
| X | ||||||||||
- Definition Represents the information pertaining to Basis of Presentation. No definition available.
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| X | ||||||||||
- Definition Cash and cash equivalents plus debt securities No definition available.
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