|In CHF million, except where indicated||2021||2020||Change|
|Infrastructure & Support Functions||76||83||–8.4%|
|Other Operating Segments||1,033||1,014||1.9%|
|Revenue from external customers||11,183||11,100||0.7%|
|Operating income before depreciation and amortisation (EBITDA)|
|Infrastructure & Support Functions||(1,131)||(1,104)||2.4%|
|Other Operating Segments||166||184||–9.8%|
|Reconciliation pension cost 2||14||(65)|
|Operating income before depreciation and amortisation (EBITDA)||4,478||4,382||2.2%|
1 Incl. intersegment recharges of services performed by other network providers.
2 Operating income of segments includes ordinary employer contributions as pension fund expense. The difference to the pension cost according to IAS 19 is recognised as a reconciliation item.
For its services, the Infrastructure & Support Functions business division does not charge any network costs or management fees to other segments. All other services between the segments are charged at market prices. Network costs in Switzerland are budgeted, monitored and controlled by the Infrastructure & Support Functions segment, which is managed as a cost centre. For this reason, no revenue is credited to the Infrastructure & Support Functions segment within the segment reporting, with the exception of the rental and administration of buildings and vehicles. The results of the Residential Customers, Business Customers and Wholesale segments thus correspond to a contribution margin before network costs.