Employee Equity Incentive Plans (Tables)

12 Months Ended

Dec. 26, 2020

Employee Benefit and Share-based Payment Arrangement, Noncash Expense [Abstract]

Restricted Stock Units Estimated Values And Weighted Average Assumptions [Table Text Block]

Restricted Stock Units

Weighted average assumptions used in estimating grant values were as follows:

	Dec 26, 2020			Dec 28, 2019			Dec 29, 2018
Estimated values	$	54.82		$	48.06		$	48.95
Risk-free interest rate	0.4		%	2.3		%	2.4		%
Dividend yield	2.3		%	2.5		%	2.4		%
Volatility	30		%	25		%	22		%

Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

Summary of activities:

	Number of Stock Units (In Millions)	Weighted Average Grant-Date Fair Value
December 28, 2019	84.1	$	43.86
Granted	40.4	$	54.82
Vested	(33.3)	$	40.54
Forfeited	(8.5)	$	47.89
December 26, 2020	82.7	$	50.14
Expected to vest	76.7	$	50.06