Retirement Plans Funded Status of the Defined Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Change in benefit obligation:
Actuarial loss (gain)	$ 98	$ 100	$ (97)
Change in plan assets:
Fair value of plan assets as of beginning of year	923
Employer contribution			71
Fair value of plan assets as of end of year	1,112	923
Amounts recognized in the consolidated balance sheets consist of the following:
Accrued benefit obligation—noncurrent	(8)	(7)
Pension Benefits
Change in benefit obligation:
Benefit obligation as of beginning of year	903	871	976
Service cost	3	2	2
Interest cost	32	37	36
Actuarial loss (gain)	98	100	(97)
Settlements	0	(84)	0
Benefit disbursements	(45)	(23)	(46)
Smart Foodservice assumed benefit obligations	70	0	0
Benefit obligation as of end of year	1,061	903	871
Change in plan assets:
Fair value of plan assets as of beginning of year	923	836	851
Return on plan assets	183	193	(40)
Employer contribution	0	1	71
Settlements	0	(84)	0
Benefit disbursements	(45)	(23)	(46)
Smart Foodservice acquired plan assets	51	0	0
Fair value of plan assets as of end of year	1,112	923	836
Net funded status	51	20	(35)
Amounts recognized in the consolidated balance sheets consist of the following:
Prepaid benefit obligation—noncurrent	53	22	0
Accrued benefit obligation—current	0	0	0
Accrued benefit obligation—noncurrent	(2)	(2)	(35)
Net amount recognized in the consolidated balance sheets	51	20	(35)
Amounts recognized in accumulated other comprehensive loss consist of the following:
Net loss	98	129	190
Net loss recognized in accumulated other comprehensive loss	98	129	190
Accumulated benefit obligation	1,057	899	869
Other Postretirement Plans
Change in benefit obligation:
Benefit obligation as of beginning of year	6	6	7
Benefit disbursements	(1)	(1)	(1)
Other	1	1	0
Benefit obligation as of end of year	6	6	6
Change in plan assets:
Fair value of plan assets as of beginning of year	0	0	0
Employer contribution	1	1	1
Benefit disbursements	(1)	(1)	(1)
Fair value of plan assets as of end of year	0	0	0
Net funded status	(6)	(6)	(6)
Amounts recognized in the consolidated balance sheets consist of the following:
Accrued benefit obligation—current	0	(1)	(1)
Accrued benefit obligation—noncurrent	(6)	(5)	(5)
Net amount recognized in the consolidated balance sheets	(6)	(6)	(6)
Amounts recognized in accumulated other comprehensive loss consist of the following:
Net loss	0	1	1
Net loss recognized in accumulated other comprehensive loss	0	1	1
Accumulated benefit obligation	$ 6	$ 6	$ 6