Employee Benefits - Contributions to Employee Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Dec. 28, 2019
Defined Benefit Plan Disclosure [Line Items]
Employer contributions to employee benefit plans	$ 6	$ 5	$ 28
Total current year projected employer contributions	26
Global Plans | Pension
Defined Benefit Plan Disclosure [Line Items]
Employer contributions to employee benefit plans	3	1	10
Total current year projected employer contributions	7
U.S. and Canada | Nonpension postretirement
Defined Benefit Plan Disclosure [Line Items]
Employer contributions to employee benefit plans	3	$ 4	$ 18
Total current year projected employer contributions	$ 19