Consolidated Statement of Changes

in Accrued Pension Benefits

For the years ended December 31 ($ millions)   2010     2009
ACCRUED PENSION BENEFITS, BEGINNING OF YEAR $ 12,313   $ 11,631
INCREASE IN ACCRUED PENSION BENEFITS
Income required on accrued pension benefits   835     827
Benefits accrued   418     417
Assumption change losses   235     -
Experience losses   -     53
(Refund)/Purchase of collectively bargained temporary benefits   (19)     116
    1,469     1,413
DECREASE IN ACCRUED PENSION BENEFITS
Benefit payments   621     718
Experience gains   227   -
Administrative expenses recognized   11     13
    859     731
NET INCREASE IN ACCRUED PENSION BENEFITS   610     682

The accompanying notes to the consolidated financial statements are an integral part of this statement.