Net Income Attributable to PepsiCo per Common Share (Out-of-the-money options) (Details) - $ / shares		12 Months Ended
		Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Out-of-the-money options excluded from earnings per share	[1]	0.7	0.4	0.7
Out-of-the-money options average exercise price		$ 109.83	$ 110.12	$ 99.98

[1] In millions.