1. A computer program product for aggregating document usage information for an electronic document, the computer program product comprising one or more computer-readable tangible storage devices; program instructions, stored on at least one of the one or more storage devices, to assign a unique identifier to each segment of a plurality of segments of the electronic document at a time of creation of the electronic document; program instructions, stored on at least one of the one or more storage devices, to determine usage indication data associated with each segment of the plurality of segments of the electronic document, wherein the usage indication data comprise a measure of time spent using the electronic document; program instructions, stored on at least one of the one or more storage devices, to aggregate the usage indication data for a plurality of users of the electronic document on a segment by segment basis; and program instructions, stored on at least one of the one or more storage devices, to communicate to a user of the electronic document the aggregate usage indication data on a segment by segment basis.