On your GCP console Billing dashboard, click on Payment settings:
You will see your payment account ID and also note your payment option; it is set to Automatic payments.
Click on Billing export. Google allows you to export your billing as a BigQuery dataset or as a file export. You can use these features to further analyze your billing and resource consumption activity to further reduce costs. You will need a BigQuery dataset before you can export your billing data. For the file export, you will need a cloud storage bucket where the data will be stored.
You can import this data into a Billing Dashboard using Google's data studio suite. The following is a sample output based on some test data: