Net Income Attributable to PepsiCo per Common Share (Out-of-the-money options) (Details) - $ / shares		12 Months Ended
		Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Earnings Per Share [Abstract]
Out-of-the-money options excluded from earnings per share	[1]	0.4	0.7	1.5
Out-of-the-money options average exercise price		$ 110.12	$ 99.98	$ 99.25

[1] In millions.