Summary of Significant Accounting Policies Hyperinflationary Economies (Details)
$ in Millions
|3 Months Ended|
Mar. 31, 2017
|Impairment of Intangible Assets (Excluding Goodwill)||$ 20|
The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.
Reference 1: http://www.xbrl.org/2003/role/presentationRef