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Investments in Equity Securities (Investment in ABI Narrative) (Details) shares in Millions, $ in Millions |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 14, 2024 shares | Mar. 31, 2024 USD ($) shares | Mar. 31, 2024 USD ($) | Sep. 30, 2022 USD ($) | Dec. 31, 2024 USD ($) board_member shares | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Mar. 13, 2024 shares
Investments [Line Items] |  |  |  |  |  |  |  |  |
Conversion of stock, shares converted (in shares) | shares |  | 60.0 |  |  |  |  |  |  |
Proceeds from the ABI Transaction | [1] |  |  |  |  | $ 2,353 | $ 0 | $ 0 |
Equity method investments |  |  |  |  |  | $ 315 |  |  |
ABI [Member] |  |  |  |  |  |  |  |  |
Investments [Line Items] |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage (approximately) |  |  |  |  |  | 8.10% |  |  | 10.00%
Equity method investment, number of shares owned, restricted (in shares) | shares |  |  |  |  |  | 125.0 |  |  | 185.0
Equity method investment, number of shares owned, common (in shares) | shares |  |  |  |  |  | 34.0 |  |  | 12.0
Proceeds from the ABI Transaction |  |  |  | $ 2,400 |  |  |  |  |
Equity method investment, disposal, transaction costs |  |  |  | $ 62 |  | $ 62 |  |  |
Pre-tax gain on partial sale of investment |  |  |  |  |  | 408 |  |  |
Reclassification from AOCI |  |  |  |  |  | (243) |  |  |
Partial release of a valuation allowance |  |  |  |  |  | $ 94 |  |  |
Number of board members | board_member |  |  |  |  |  | 2 |  |  |
Equity method investments |  |  |  |  |  | $ 7,880 | $ 9,676 |  |
Equity method investment, difference between carrying amount and fair value, percentage |  |  |  |  | (22.00%) |  | 32.00% |  |
Equity method investment, impairment |  |  |  |  | $ 2,500 |  |  |  |
Difference between carrying amount and underlying equity |  |  |  |  |  | 2,000 |  |  |
Decrease in difference between carrying amount and underlying equity |  |  |  |  |  | 500 |  |  |
ABI [Member] | Marketing Administration And Research Costs [Member] |  |  |  |  |  |  |  |  |
Investments [Line Items] |  |  |  |  |  |  |  |  |
Equity method investment, disposal, transaction costs |  |  |  |  |  | 59 |  |  |
ABI [Member] | Interest Income (Expense), Net [Member] |  |  |  |  |  |  |  |  |
Investments [Line Items] |  |  |  |  |  |  |  |  |
Equity method investment, disposal, transaction costs |  |  |  |  |  | 3 |  |  |
ABI [Member] | Secondary Offering [Member] |  |  |  |  |  |  |  |  |
Investments [Line Items] |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (shares) | shares |  |  | 35.0 |  |  |  |  |  |
Sale of stock, consideration received on transaction |  |  | $ 2,200 |  |  |  |  |  |
ABI [Member] | Private Placement [Member] |  |  |  |  |  |  |  |  |
Investments [Line Items] |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (shares) | shares |  |  | 3.3 |  |  |  |  |  |
Sale of stock, consideration received on transaction |  |  | $ 200 |  |  |  |  |  |
Level 1 [Member] | ABI [Member] |  |  |  |  |  |  |  |  |
Investments [Line Items] |  |  |  |  |  |  |  |  |
Fair value of investment |  |  |  |  |  | $ 7,900 | $ 12,700 |  |
Equity method investment, difference between carrying amount and fair value |  |  |  |  | $ (2,500) |  |  |  |
[1] | See Note 8. Investments in Equity Securities.

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