Income Taxes (Unaudited) (Details 2) $ in Millions	3 Months Ended
Mar. 31, 2019 USD ($)
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits, Increase resulting from 2017 Tax Act	$ 15
Increase in Unrecognized Tax Benefits is Reasonably Possible	$ 70

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant