Unearned Revenue by Segment (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Jun. 30, 2019
Contract With Customer Liability [Line Items]
Unearned revenue	$ 31,221	$ 37,206
Productivity and Business Processes
Contract With Customer Liability [Line Items]
Unearned revenue	14,266	16,831
Intelligent Cloud
Contract With Customer Liability [Line Items]
Unearned revenue	13,766	16,988
More Personal Computing
Contract With Customer Liability [Line Items]
Unearned revenue	$ 3,189	$ 3,387