|In CHF million, except where indicated||2020||2019||Change|
|IT, Network & Infrastructure||85||85||0.0%|
|Other Operating Segments||1,020||1,079||–5.5%|
|Revenue from external customers||11,100||11,453||–3.1%|
|Operating income before depreciation and amortisation (EBITDA)|
|IT, Network & Infrastructure||(1,042)||(1,191)||–12.5%|
|Other Operating Segments||185||189||–2.1%|
|Reconciliation pension cost 2||(65)||(47)||38.3%|
|Operating income before depreciation and amortisation (EBITDA)||4,382||4,358||0.6%|
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.
The IT, Network & Infrastructure segment does not charge any network costs to other segments, nor does Group Headquarters charge any management fees to other segments. Any other services between the segments are charged at market prices. Network costs in Switzerland are budgeted, monitored and controlled by the IT, Network & Infrastructure division, which is managed as a cost centre. For this reason, no revenue is credited to the IT, Network & Infrastructure 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.