Income Taxes - Additional Information Regarding Examinations (Detail) - USD ($) $ in Billions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2015 |
Mar. 31, 2011 |
Mar. 31, 2017 |
Jun. 30, 2016 |
|
Income Tax Examination [Line Items] | ||||
Tax contingencies and other tax liabilities | $ 14.4 | $ 11.8 | ||
Earliest Tax Year | Foreign Country | ||||
Income Tax Examination [Line Items] | ||||
Tax years subject to examination | 1996 | |||
Latest Tax Year | Foreign Country | ||||
Income Tax Examination [Line Items] | ||||
Tax years subject to examination | 2017 | |||
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 |