Related Parties - Equity Investments and Other: (Balance Sheet and Earnings Activity) (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2023		Sep. 30, 2022		Sep. 30, 2023		Sep. 30, 2022		Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Total PMI net revenues		$ 9,141	[1],[2]	$ 8,032	[1],[2]	$ 26,127	[3],[4]	$ 23,610	[3],[4]
Expenses		67		33		180		62
Trade receivables, related parties	[5]	3,891				3,891				$ 3,850
Payables		3,533				3,533				4,076
Related Party
Schedule of Equity Method Investments [Line Items]
Total PMI net revenues		857		1,087		2,631		2,634
Trade receivables, related parties		655				655				688
Payables		33				33				31
Megapolis Group | Related Party
Schedule of Equity Method Investments [Line Items]
Total PMI net revenues		530		777		1,714		1,770
Trade receivables, related parties		394				394				478
Other
Schedule of Equity Method Investments [Line Items]
Expenses		67		33		180		62
Other | Related Party
Schedule of Equity Method Investments [Line Items]
Total PMI net revenues		327		$ 310		917		$ 864
Trade receivables, related parties		261				261				210
Payables		$ 33				$ 33				$ 31

[1] Includes net revenues from related parties of $857 million and $1,087 million for the three months ended September 30, 2023 and 2022, respectively

[2] Net of excise taxes of $13,092 million and $12,856 million for the three months ended September 30, 2023 and 2022, respectively

[3] Includes net revenues from related parties of $2,631 million and $2,634 million for the nine months ended September 30, 2023 and 2022, respectively

[4] Net of excise tax on products of $37,140 million and $37,028 million for the nine months ended September 30, 2023 and 2022, respectively

[5] Includes trade receivables from related parties of $655 million and $688 million as of September 30, 2023, and December 31, 2022, respectively (less allowances of $43 million as of September 30, 2023 and $7 million as of December 31, 2022). For further details, see Note 14. Related Parties - Equity Investments and Other.