Earnings per Share (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net earnings attributable to PMI	$ 1,616	$ 1,896	$ 2,319	$ 1,354	$ 1,910	$ 2,247	$ 2,198	$ 1,556	$ 7,185	$ 7,911	$ 6,035
Less distributed and undistributed earnings attributable to share-based payment awards									17	16	14
Net earnings for basic and diluted EPS									$ 7,168	$ 7,895	$ 6,021
Weighted-average shares for basic EPS (in shares)									1,555,000,000	1,555,000,000	1,552,000,000
Plus contingently issuable performance stock units (PSUs) (in shares)									1,000,000	0	1,000,000
Weighted-average shares for diluted EPS (in shares)									1,556,000,000	1,555,000,000	1,553,000,000
Antidilutive stock options (in shares)									0	0	0