Organization and Summary of Significant Accounting Policies Principles of Consolidation and Basis of Presentation (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016
schedule of consolidation [Line Items]
Revenue	$ 2,061	$ 2,061	$ 2,056	$ 2,056	$ 4,109	$ 4,107
Adjusted EBITDA by Segment		722		715	1,427	1,425
Latin America [Member]
schedule of consolidation [Line Items]
Adjusted EBITDA by Segment		$ 77		$ 64	$ 157	$ 138

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration