Fair Value Measurements - Assets and Liabilities Measured on a Recurring Basis (Details) - Fair Value - USD ($) $ in Millions	Sep. 27, 2019	Jun. 28, 2019
Assets
Deferred compensation plan assets	$ 54	$ 127
Derivatives (foreign currency forward contracts)	4	0
Total assets measured at fair value	58	127
Liabilities
Deferred compensation plan liabilities	59	157
Derivatives (foreign currency forward contracts)	12	0
Derivatives (treasury lock contracts)	107	26
Total liabilities measured at fair value	178	183
Equity securities and mutual funds
Liabilities
Deferred compensation plan liabilities	3	25
Equity and fixed income securities
Assets
Deferred compensation plan assets	0	38
Level 1
Assets
Deferred compensation plan assets	0	38
Derivatives (foreign currency forward contracts)	0	0
Total assets measured at fair value	0	38
Liabilities
Deferred compensation plan liabilities	3	25
Derivatives (foreign currency forward contracts)	0	0
Derivatives (treasury lock contracts)	0	0
Total liabilities measured at fair value	3	25
Level 1 | Equity securities and mutual funds
Liabilities
Deferred compensation plan liabilities	3	25
Level 1 | Equity and fixed income securities
Assets
Deferred compensation plan assets	0	38
Level 2
Assets
Deferred compensation plan assets	0	0
Derivatives (foreign currency forward contracts)	4	0
Total assets measured at fair value	4	0
Liabilities
Deferred compensation plan liabilities	0	0
Derivatives (foreign currency forward contracts)	12	0
Derivatives (treasury lock contracts)	107	26
Total liabilities measured at fair value	119	26
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
Assets
Deferred compensation plan assets	54	89
Investments measured at NAV | Common/collective trusts and guaranteed investment contracts
Liabilities
Deferred compensation plan liabilities	56	132
Investments measured at NAV | Equity securities and mutual funds
Assets
Deferred compensation plan assets	26	61
Investments measured at NAV | Corporate-owned life insurance
Assets
Deferred compensation plan assets	$ 28	$ 28