Unearned Revenue by Segment (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Contract With Customer Liability [Line Items]
Unearned revenue	$ 34,026	$ 37,206
Productivity and Business Processes
Contract With Customer Liability [Line Items]
Unearned revenue	15,560	16,831
Intelligent Cloud
Contract With Customer Liability [Line Items]
Unearned revenue	15,255	16,988
More Personal Computing
Contract With Customer Liability [Line Items]
Unearned revenue	$ 3,211	$ 3,387