Retirement Plans Additional Information (Details) - USD ($)	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018	Apr. 24, 2020
Defined Benefit Plan Disclosure [Line Items]
Employer contribution			$ 71,000,000
Defined benefit plans, incremental contributions by employer			35,000,000
Settlement payments		$ 66,000,000
Settlements	$ 0	(12,000,000)
Actuarial (loss) gain	98,000,000	100,000,000	(97,000,000)
Smart Foodservice [Member]
Defined Benefit Plan Disclosure [Line Items]
Smart Foodservice Net Benefit Obligation				$ 19,000,000
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Smart Foodservice Net Benefit Obligation	51,000,000	20,000,000	(35,000,000)
Prepaid benefit obligation—noncurrent	53,000,000	22,000,000	0
Employer contribution	0	1,000,000	71,000,000
Actuarial (loss) gain	98,000,000	100,000,000	(97,000,000)
Defined Contribution Plan 401K
Defined Benefit Plan Disclosure [Line Items]
Company's contributions to plan	$ 47,000,000	$ 51,000,000	$ 47,000,000
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target asset allocations	35.00%
Defined benefit actual plan asset allocations	35.00%
Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target asset allocations	65.00%
Defined benefit actual plan asset allocations	65.00%