You can export the detailed report of your activities by going to Acitvity and click on the download button as shown below.
By selecting one of "Report" options, you'll get a nice looking report for your client or manager. Even grouping settings will apply ("Email" option will send an email to the recipient with PDF report attached).
"Export" option offers a raw export of your time logs with no grouping or styling. This way you can slice and dice your data further in Excel or other preferred spreadsheet software.
You can also get the summarized Dashboard report structured by projects, clients, tasks or team members. These reports are available in PDF and Excel formats, and there is an option to Email the report as well ("Email" option will send an email to the recipient with PDF report attached).