Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions		12 Months Ended
	Apr. 01, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Jul. 01, 2018	Jul. 01, 2016
Significant Accounting Policies [Line Items]
Current and long-term accounts receivable, net of allowance for doubtful accounts						$ 22,300
Long-term accounts receivable, net of allowance for doubtful accounts		$ 1,800	$ 1,700
Description of payment terms in contract with customer		Payment terms and conditions vary by contract type, although terms generally include a requirement of payment within 30 to 60 days.
Advertising expense		$ 1,600	1,500	$ 1,600
Retained earnings		13,682	17,769
Long-term deferred tax liabilities		541	5,734
Other current assets		$ 6,751	$ 5,103
Accounting Standards Update 2018-02
Significant Accounting Policies [Line Items]
Reclassification of net tax benefit from AOCI to retained earnings	$ 42
Accounting Standards Update 2016-16 | Scenario Plan
Significant Accounting Policies [Line Items]
Retained earnings					$ 550
Long-term deferred tax assets					2,800
Long-term deferred tax liabilities					2,100
Other current assets					$ (150)
Lower Limit
Significant Accounting Policies [Line Items]
Estimated useful lives of intangible assets		1 year
Lower Limit | Software
Significant Accounting Policies [Line Items]
Estimated useful lives		3 years
Lower Limit | Computer Equipment
Significant Accounting Policies [Line Items]
Estimated useful lives		2 years
Lower Limit | Buildings and Improvements
Significant Accounting Policies [Line Items]
Estimated useful lives		5 years
Lower Limit | Leasehold Improvements
Significant Accounting Policies [Line Items]
Estimated useful lives		3 years
Lower Limit | Furniture and Fixtures
Significant Accounting Policies [Line Items]
Estimated useful lives		1 year
Upper Limit
Significant Accounting Policies [Line Items]
Estimated useful lives of intangible assets		20 years
Upper Limit | Software
Significant Accounting Policies [Line Items]
Estimated useful lives		7 years
Upper Limit | Computer Equipment
Significant Accounting Policies [Line Items]
Estimated useful lives		3 years
Upper Limit | Buildings and Improvements
Significant Accounting Policies [Line Items]
Estimated useful lives		15 years
Upper Limit | Leasehold Improvements
Significant Accounting Policies [Line Items]
Estimated useful lives		20 years
Upper Limit | Furniture and Fixtures
Significant Accounting Policies [Line Items]
Estimated useful lives		10 years