Sure, sure. So Tom, 2015 is quite a while ago. And as you know, there's been massive changes to the portfolio pretty much across the board. So I mean when you think about it, not only from 2015, but when Brian arrived in 2017, you've got a targeted risk reduction program that really went across the board with a revamped risk appetite, no matter how you looked at it. So that's been successfully implemented on both sides of the balance sheet, and it's involved the parent and GI and Life and Retirement and investments. And the operating subsidiary RBC, and risk-based capital, is strong for both GI and for L&R and the volatility in total and within each of those operations has clearly been markedly reduced.
So -- and just as a little bit of a remembrance, so you see exactly the kind of risk reduction, which involves all the things you asked about. So the investment derisking, the Fortitude transaction, which we went into great detail, moving not only $35 billion of reserves, $31 billion of it was on Life and Retirement and $4-plus billion on GI, but it's also what constitutes those reserves. So when you look under the covers and you see a lot of structured settlement reserves and a lot of single premium immediate annuity reserves, those are clearly loaded with interest rate risk.
So now that type of volatility and that kind of issue has now been pushed off as well. We have the ADC that we put into place with General Insurance that still has $6.4 billion unused, representing an 80% cession. The underwriting change to the book that has been massive, both on the front end and a proper reinsurance structure to protect it, as Peter always talked about.
Consequence, the P&Ls have gone down enormously. The marketplace taking advantage of that with improved earnings by driving compound rate and improved terms and conditions but trimming the portfolio the right way, not just renewing books of business but getting into classes and things doing it properly.
And not only on that, we've got the -- what we kind of referenced earlier, which was the debt rates that we had that allowed us to having risk management -- liquidity risk management capability in front of the prefunding of those maturing debt securities. So I think all in, we've got a lot of strength in earnings, a lot of strength in -- of lesser volatility around those earnings, and there is certainly a reduction in all those things combined.