Which solution meets these requirements?
Run a query with Amazon Athena to generate the report.
Create a report in Cost Explorer and download the report.
Access the bill details from the billing dashboard and download the bill.
Modify a cost budget in AWS Budgets to alert with Amazon Simple Email Service (Amazon SES).
Explanations:
Amazon Athena can query data from AWS Cost and Usage Reports (CUR), but it requires the CUR data to be configured and available. This solution might be complex for simple departmental budgeting, as it involves setting up Athena and CUR first.
Cost Explorer provides an easy-to-use interface for generating reports based on AWS billing data, and it allows users to download these reports in CSV format, which meets the requirements for departmental budgeting by listing items by user.
The billing dashboard provides an overall view of the bill but does not provide detailed usage reports broken down by user. It also lacks the ability to customize reports for budgeting purposes.
AWS Budgets can create alerts based on cost thresholds but does not generate detailed billing reports by user. It is focused on monitoring and alerting rather than detailed reporting.
My best guess is:
Create a report in Cost Explorer and download the report.