Major Classes of Assets and Liabilities to Which We Allocated the Purchase Price (Parenthetical) (Detail) - USD ($) |
Jun. 30, 2018 |
Jun. 30, 2017 |
Dec. 08, 2016 |
|---|---|---|---|
| Business Acquisition [Line Items] | |||
| Long-term debt | $ 76,898,000,000 | $ 77,837,000,000 | |
| LinkedIn Corporation | |||
| Business Acquisition [Line Items] | |||
| Goodwill expected to be deductible for income tax purposes | $ 0 | ||
| Long-term debt | $ 18,000,000 |