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Accounts Receivable	9 Months Ended
Accounts Receivable	Sep. 30, 2015
Accounts Receivable [Abstract]
Accounts Receivable [Text Block]	4. Accounts Receivable Our allowance for doubtful accounts receivable, which is reflected in the Consolidated Balance Sheets as a reduction of accounts receivable, totaled $25 million and $29 million at September 30, 2015 and December 31, 2014, respectively.