Notes to the Consolidated Financial Statements Reconciliation of present value of defined benefit obligation (22.3) in CHF million 2018 2017 Switzerland Other plans Total Switzerland Other plans Total Opening balance at January 1 (1,111.8) (317.5) (1,429.3) (1,142.4) (294.8) (1,437.2) Change in scope of consolidation – – – – (1.2) (1.2) Current service cost (27.5) (9.3) (36.8) (28.5) (8.1) (36.6) Interest expense on defined benefit obligation (8.4) (6.7) (15.1) (8.6) (6.5) (15.1) Actuarial gains/(losses) (20.6) 12.8 (7.8) 55.1 (0.2) 54.9 Contributions by plan participants (16.1) – (16.1) (15.2) – (15.2) Benefits paid 34.4 8.9 43.3 30.0 10.3 40.3 Past service cost (3.5) (2.7) (6.2) (2.2) 1.1 (1.1) Settlements – 0.7 0.7 – 0.7 0.7 Currency translation adjustment – 11.4 11.4 – (18.8) (18.8) Closing balance at December 31 (1,153.5) (302.4) (1,455.9) (1,111.8) (317.5) (1,429.3) Components of defined benefit costs recognized in the income statement (22.4) in CHF million 2018 2017 Switzerland Other plans Total Switzerland Other plans Total Current service cost (27.5) (9.3) (36.8) (28.5) (8.1) (36.6) Past service cost (3.5) (2.7) (6.2) (2.2) 1.1 (1.1) Gains/(losses) on settlements – (0.5) (0.5) – 0.4 0.4 Total service cost (31.0) (12.5) (43.5) (30.7) (6.6) (37.3) Interest income on plan assets 6.5 3.1 9.6 6.1 3.0 9.1 Interest expense on defined benefit obligation (8.4) (6.7) (15.1) (8.6) (6.5) (15.1) Net interest income/(expense) on defined benefit plans (1.9) (3.6) (5.5) (2.5) (3.5) (6.0) Total defined benefit costs recognized in the income statement (32.9) (16.1) (49.0) (33.2) (10.1) (43.3) In the income statement, the various components of the defined benefit costs are included as follows: • Total service cost – in ‘personnel expenses’ (see note (31)) and • Interest income and expense – in ‘other income and expenses (net)’ (see note (34)). 2018 Financial Report | 59