Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (d)(3)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

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Income Taxes (Details) - USD ($) $ in Millions	Feb. 18, 2014	Jun. 30, 2017
Income Tax Examination [Line Items]
Potential decrease in unrecognized tax benefits		$ 58
Internal Revenue Service (IRS) \| Tax Year 2006
Income Tax Examination [Line Items]
IRS Notice of Deficiency tax assessment	$ 70