Net Income Attributable to PepsiCo per Common Share Out-of-the-money options excluded from the calculation of diluted earnings per common share (Details) - $ / shares shares in Millions		3 Months Ended
		Mar. 23, 2019	Mar. 24, 2018
Out-of-the-money options [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	[1]	1.2	0.1
Antidilutive Securities Excluded From Computation Of Earnings Per Share, Average Exercise per Share Amount		$ 115.98	$ 115.75

[1] In millions.