The out-of-the-box custom object meant to represent sub-deals with their respective details (amount, date, etc.) within Salesforce CPQ isQuoteGroup. This object is used to group related quote lines or products, allowing for the capture and management of specific details and conditions related to subsets of a larger deal.
QuoteGroups enable the organization and structuring of complex quotes, facilitating the handling of detailed pricing, discounts, and terms for different parts of a quote.
References:
Salesforce CPQ documentation:https://help.salesforce.com/
Salesforce CPQ User Guide: https://www.salesforce.com/products/cpq/resources/