Income Taxes - Additional Information Regarding Examinations (Detail) - USD ($) $ in Billions |
3 Months Ended | |||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Mar. 31, 2011 |
Jun. 30, 2016 |
|
| Income Tax Examination [Line Items] | ||||
| Tax contingencies and other tax liabilities | $ 12.3 | $ 11.8 | ||
| Internal Revenue Service (IRS) | Earliest Tax Year | ||||
| Income Tax Examination [Line Items] | ||||
| Tax years under audit | 2007 | 2004 | ||
| Tax years subject to examination | 2010 | |||
| Internal Revenue Service (IRS) | Latest Tax Year | ||||
| Income Tax Examination [Line Items] | ||||
| Tax years under audit | 2009 | 2006 | ||
| Tax years subject to examination | 2016 | |||
| Foreign Country | Earliest Tax Year | ||||
| Income Tax Examination [Line Items] | ||||
| Tax years subject to examination | 1996 | |||
| Foreign Country | Latest Tax Year | ||||
| Income Tax Examination [Line Items] | ||||
| Tax years subject to examination | 2016 | |||