Pension - discount rate

When choosing discount rate, do we consider the company’s rating?

For example, Apple has very hight credit so we use AA rating bond yield. On the other hand, credit rating BB or below company we choose very hgih yield as a discount rate. Do we need to do this?

Discount of rate of company FCF is WACC, which used increased WACD baed on rating .

Yes, but what’s for pension topic?

I thought the discount rate in pension is actuarially determined. Thus we (CFA candidates) don’t need to know and take it as given.

Let the actuaries take care of it.