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Investments in Equity Securities (Investment in Cronos Narrative) (Details) shares in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) shares | Sep. 30, 2022 USD ($) | Sep. 30, 2023 $ / shares | Dec. 31, 2022 USD ($)
Investments [Line Items] |  |  |  |  |
Equity method investment, difference between carrying amount and fair value | $ (2,500,000,000) |  | $ (2,500,000,000) |  |
Equity method investment, impairment | $ 2,500,000,000 |  | $ 2,500,000,000 |  |
Cronos [Member] |  |  |  |  |
Investments [Line Items] |  |  |  |  |
Ownership percentage |  | 41.10% |  |  |
Number of ordinary shares owned (approximately) (in shares) | shares |  | 156.6 |  |  |
Equity method investment, difference between carrying amount and fair value |  | $ (31,000,000) |  |  | $ 22,000,000
Equity method investment, difference between carrying amount and fair value, percentage (approximately) |  | (9.00%) |  |  | (6.00%)
Equity method investment, impairment |  | $ 0 |  |  |
Equity Contract, Preemptive Rights [Member] | Cronos [Member] |  |  |  |  |
Investments [Line Items] |  |  |  |  |
Equity method investment, shares purchased, (CAD per share) | $ / shares |  |  |  | $ 16.25 |
Equity method investments, fixed preemptive rights |  | $ 0 |  |  | $ 0

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