Investment in Affiliates, at Equity - Investment in Affiliate Exchange Rates (Details) - Fuji Xerox	3 Months Ended	12 Months Ended
Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Summary of operations, weighted average rate	108.07	110.28	112.14	108.76
Balance sheet, year-end rate		110.26	112.87	116.53

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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