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Investments in Equity Securities (Investment in ABI Narrative) (Details) - USD ($) shares in Millions, $ in Millions | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2022 | Jun. 30, 2022 | Dec. 31, 2021
Investments [Line Items] |  |  |  |  |
Fair value of investment | $ 11,200 |  |  |  |
ABI [Member] |  |  |  |  |
Investments [Line Items] |  |  |  |  |
Equity method investment, ownership percentage (approximately) |  |  | 10.00% |  |
Equity method investment, number of shares owned, restricted (in shares) |  |  | 185 |  |
Equity method investment, number of shares owned, common (in shares) |  |  | 12 |  |
Equity method investments |  | $ 11,200 | $ 8,975 |  | $ 11,144
Equity method investment, difference between carrying amount and fair value, percentage | (22.00%) | (35.00%) | 33.00% |  |
Equity method investment, impairment | $ 2,500 | $ 6,200 |  |  |
Difference between carrying amount and underlying equity |  |  | $ 2,500 |  |
Level 1 [Member] | ABI [Member] |  |  |  |  |
Investments [Line Items] |  |  |  |  |
Fair value of investment | 9,000 | 11,200 | $ 11,900 |  | 11,900
Equity method investments |  |  |  |  | 11,100
Equity method investment, difference between carrying amount and fair value | $ (2,500) | $ (6,200) |  | $ (1,100) | $ 800
Equity method investment, difference between carrying amount and fair value, percentage |  |  |  | (9.00%) | 7.00%

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- Definition Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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