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Condensed Financial Information (Parent Company) (Investment in Subsidiaries - Narrative) (Details) - Parent Company - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Dec. 30, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Payments to Acquire Businesses, Gross |  | $ 0 | $ 0 | $ 1,875
Sales of businesses |  | $ 0 | $ 3,902 | $ 0
Versant Health, Inc. [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Payments to Acquire Businesses, Gross | $ 1,800 |  |  |

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