187 ANNUAL REPORT 2010 Movements during the year of the present value of the defi ned benefi t obligations: 2010 2009 At January 1 4,603 4,023 Disposal of a business – (14) Current year service costs 99 85  Interest cost 272 245  Contributions by plan participants 11 11  Actuarial (gains)/losses 258 475  Benefi ts paid (256)  (207) Settlements and curtailments (40) – Past service cost 3  (1) Net exchange differences 183  (17) Other 3 3 AT DECEMBER 31 5,136 4,603 Movements during the year in plan assets for retirement benefi t plans: 2010 2009 At January 1 2,092 1,786 Disposal of a business – (3) Expected return on plan assets 162 133 Actuarial gains/(losses) 175 241  Contributions by employer 53 51  Contributions by plan participants – 1 Benefi ts paid (109)  (102) Net exchange differences 134  (14) Other – (1) AT DECEMBER 31 2,507 2,092 Breakdown of plan assets for retirement benefi t plans: 2010 2009 Equity instruments 1,418 1,198 Debt instruments 933 774 Other 156 120 AT DECEMBER 31 2,507 2,092 All other post-employment benefits plans are unfunded.  All other post-employment benefits plans are unfunded. SHARPENING OUR FOCUS