Earnings Per Share (Calculation of Basic and Diluted EPS) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net earnings attributable to PMI	$ 2,307	$ 1,896	$ 6,080	$ 5,569
Less distributed and undistributed earnings attributable to share-based payment awards	5	5	15	13
Net earnings for basic and diluted EPS	$ 2,302	$ 1,891	$ 6,065	$ 5,556
Weighted-average shares for basic EPS (in shares)	1,558,000,000	1,556,000,000	1,557,000,000	1,556,000,000
Plus contingently issuable performance stock units (PSUs) (in shares)	0	0	0	0
Weighted-average shares for diluted EPS (in shares)	1,558,000,000	1,556,000,000	1,557,000,000	1,556,000,000
Antidilutive stock awards (in shares)			0	0