Large scale detectors in particle physics take many years to plan and to build. The last generation of large particle physics detectors for the energy frontier, ATLAS and CMS, have been operating for more than 10 years, and upgrades for them are now being done. Studies for the next generation of experimental facilities have been ongoing for a number of years. In this section future directions in integrated detector design are discussed, as they were visible at the time of writing this report. At the moment the biggest approved project in particle physics is the upgrade of the Large Hadron Collider (LHC) towards high luminosity running. This project is scheduled to be completed by 2027, and major upgrades to the two main collider detectors ATLAS and CMS are planned. Beyond the LHC, an electron-positron collider has been discussed for many years, to fully explore the Higgs and the top sector and to complement the discovery reach of a hadron machine at the energy frontier with a high precision program. The requirements as far as detectors are concerned are very different for these two types of projects: for the LHC luminosity upgrade fundamental changes to the underlying philosophy of the existing detectors are not possible, but significant technological development is needed to meet the challenges of extreme radiation environments and high event rates. For a yet not existing electron-positron collider a detector can be designed from ground up, optimised to meet the ambitious physics agenda of such a facility.