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Deferred Income	12 Months Ended
Deferred Income	Dec. 31, 2017
Deferred Income
Deferred Income	(19) Deferred Income Deferred income consists mainly of prepayments made by our customers for cloud subscriptions and support; software support and services; fees from multiple-element arrangements allocated to undelivered elements; and amounts recorded in purchase accounting at fair value for obligations to perform under acquired customer contracts in connection with acquisitions.