Segment Reporting (Segment Data) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net revenues	$ 31,405	$ 28,694	$ 29,805
Operating income	12,975	11,668	10,531
Operating Segments
Segment Reporting Information [Line Items]
Net revenues	31,405	28,694	29,805
Operating income	12,975	11,668	10,531
Operating Segments | European Union
Segment Reporting Information [Line Items]
Net revenues	12,275	10,702	9,817
Operating income	6,119	5,098	3,970
Operating Segments | Eastern Europe
Segment Reporting Information [Line Items]
Net revenues	3,544	3,378	3,282
Operating income	1,213	871	547
Operating Segments | Middle East & Africa
Segment Reporting Information [Line Items]
Net revenues	3,293	3,088	4,042
Operating income	1,146	1,026	1,684
Operating Segments | South & Southeast Asia
Segment Reporting Information [Line Items]
Net revenues	4,396	4,396	5,094
Operating income	1,506	1,709	2,163
Operating Segments | East Asia & Australia
Segment Reporting Information [Line Items]
Net revenues	5,953	5,429	5,364
Operating income	2,556	2,400	1,932
Operating Segments | Americas
Segment Reporting Information [Line Items]
Net revenues	1,843	1,701	2,206
Operating income	487	564	235
Operating Segments | Other
Segment Reporting Information [Line Items]
Net revenues	101	0	0
Operating income	(52)	0	0
Operating Segments | Combustible Products
Segment Reporting Information [Line Items]
Net revenues	22,190	21,867	24,218
Operating Segments | Combustible Products | European Union
Segment Reporting Information [Line Items]
Net revenues	8,211	8,053	8,093
Operating Segments | Combustible Products | Eastern Europe
Segment Reporting Information [Line Items]
Net revenues	2,240	2,250	2,438
Operating Segments | Combustible Products | Middle East & Africa
Segment Reporting Information [Line Items]
Net revenues	3,148	3,031	3,721
Operating Segments | Combustible Products | South & Southeast Asia
Segment Reporting Information [Line Items]
Net revenues	4,385	4,395	5,094
Operating Segments | Combustible Products | East Asia & Australia
Segment Reporting Information [Line Items]
Net revenues	2,414	2,468	2,693
Operating Segments | Combustible Products | Americas
Segment Reporting Information [Line Items]
Net revenues	1,790	1,670	2,179
Operating Segments | Reduced-Risk Products
Segment Reporting Information [Line Items]
Net revenues	9,115	6,827	5,587
Operating Segments | Reduced-Risk Products | European Union
Segment Reporting Information [Line Items]
Net revenues	4,064	2,649	1,724
Operating Segments | Reduced-Risk Products | Eastern Europe
Segment Reporting Information [Line Items]
Net revenues	1,304	1,128	844
Operating Segments | Reduced-Risk Products | Middle East & Africa
Segment Reporting Information [Line Items]
Net revenues	145	57	321
Operating Segments | Reduced-Risk Products | South & Southeast Asia
Segment Reporting Information [Line Items]
Net revenues	11	1	0
Operating Segments | Reduced-Risk Products | East Asia & Australia
Segment Reporting Information [Line Items]
Net revenues	3,539	2,961	2,671
Operating Segments | Reduced-Risk Products | Americas
Segment Reporting Information [Line Items]
Net revenues	$ 53	$ 31	$ 27