Implementation of New Financial Accounting Pronouncements (Details) - USD ($) $ in Billions	12 Months Ended
Dec. 31, 2016	Sep. 30, 2017
Concentration Risk [Line Items]
New Accounting Pronouncement or Change in Accounting Principle Not Yet Adopted, Estimated Cumulative Effect of Change on Equity Upon Adoption		$ 2.0
New Accounting Pronouncement or Change in Accounting Principle Not Yet Adopted, Estimated Effect of Change on Deferred Tax Assets		$ 2.0
Revenue from Rights Concentration Risk [Member] \| Sales Revenue, Net
Concentration Risk [Line Items]
Concentration risk	4.00%
Product \| Product Concentration Risk \| Sales Revenue, Net
Concentration Risk [Line Items]
Concentration risk	96.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611

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Balance Type:	na
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