Detailed Cost Amounts are displayed as 0 in the Cost Plans using common components.
Plan options are not covering the full plan periods and the periods which are showing actually have $0 cost.
Release : 15.9.1
Component : CA PPM SAAS FINANCIAL MANAGEMENT
Make sure your periods cover the periods of the plan.
On the options dialog you can choose Plan Start Date and Plan Finish Date.
This way you will be able to see all the periods in the plan.