Fair Value Measurements - Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Millions	Dec. 28, 2018	Jun. 29, 2018
Level 1 | Equity securities and mutual funds
Liabilities
Deferred compensation plan liabilities	$ 20	$ 38
Level 1 | Equity and fixed income securities
Assets
Deferred compensation plan assets	46	46
Fair Value
Assets
Deferred compensation plan assets	129	136
Investments measured at NAV assets	83	90
Liabilities
Deferred compensation plan liabilities	152	149
Fair Value | Equity securities and mutual funds
Liabilities
Deferred compensation plan liabilities	20	38
Fair Value | Common/collective trusts and guaranteed investment contracts
Liabilities
Investments measured at NAV liabilities	132	111
Fair Value | Equity and fixed income securities
Assets
Deferred compensation plan assets	46	46
Fair Value | Equity and fixed income funds
Assets
Investments measured at NAV assets	56	63
Fair Value | Corporate-owned life insurance
Assets
Investments measured at NAV assets	$ 27	$ 27