Fair Value Measurements - Assets and Liabilities Measured on a Recurring Basis (Details) - Fair value - USD ($) $ in Millions	Jul. 03, 2020	Jan. 03, 2020
Assets
Deferred compensation plan assets	$ 86	$ 87
Derivatives (foreign currency forward contracts)	15	10
Total assets measured at fair value	101	97
Liabilities
Deferred compensation plan liabilities	77	71
Derivatives (foreign currency forward contracts)	15	8
Derivatives (treasury lock contracts)	130	56
Total liabilities measured at fair value	222	135
Equity securities and mutual funds
Liabilities
Deferred compensation plan liabilities	2	2
Equity and fixed-income securities
Assets
Deferred compensation plan assets	57	58
Level 1
Assets
Deferred compensation plan assets	57	58
Derivatives (foreign currency forward contracts)	0	0
Total assets measured at fair value	57	58
Liabilities
Deferred compensation plan liabilities	2	2
Derivatives (foreign currency forward contracts)	0	0
Derivatives (treasury lock contracts)	0	0
Total liabilities measured at fair value	2	2
Level 1 | Equity securities and mutual funds
Liabilities
Deferred compensation plan liabilities	2	2
Level 1 | Equity and fixed-income securities
Assets
Deferred compensation plan assets	57	58
Level 2
Assets
Deferred compensation plan assets	0	0
Derivatives (foreign currency forward contracts)	15	10
Total assets measured at fair value	15	10
Liabilities
Deferred compensation plan liabilities	0	0
Derivatives (foreign currency forward contracts)	15	8
Derivatives (treasury lock contracts)	130	56
Total liabilities measured at fair value	145	64
Level 2 | Equity securities and mutual funds
Liabilities
Deferred compensation plan liabilities	0	0
Level 2 | Equity and fixed-income securities
Assets
Deferred compensation plan assets	0	0
Investments measured at NAV | Common/collective trusts and guaranteed investment contracts
Liabilities
Deferred compensation plan liabilities	75	69
Investments measured at NAV | Corporate-owned life insurance
Assets
Deferred compensation plan assets	$ 29	$ 29