Note 15. Comprehensive Income: Comprehensive income includes net income and all other nonowner changes in equity during a period. The tax effect on other comprehensive income is as follows: The components of accumulated other comprehensive income are as follows: $ Millions 2000 Pre-tax amount $(61)  $(4)  $ (3)  $ (68)  Tax benefit 7 2 1 10  Net amount $(54) $(2) $ (2) $ (58)  1999 Pre-tax amount $ (5 $(1) $(84 $ (88 Tax (expense) (1) -  (29) (30)  Net amount $ (4 $(1) $(55 $ (58 1998 Pre-tax amount $(44) $(1) $(83) $(128) Tax benefit 1 1  29 31  Net amount $(43) $ - $(54) $ (97) Total Other Comprehensive Income Foreign Currency Translation Adjustments Unrealized Losses on Securities Minimum Pension Liability Adjustments $ Millions Balance at December 31, 1997  $ (68) $(1)  $ (1)  $ (70) Change in 1998 (43) -  (54) (97)  Balance at December 31, 1998 (111) (1) (55) (167) Change in 1999 4 (1) 55 58  Balance at December 31, 1999 (107) (2) -  (109)  Change in 2000 (54) (2) (2) (58)  Balance at December 31, 2000  $(161) $(4) $ (2) $(167)  Accumulated Other Comprehensive Income Foreign Currency Translation Adjustments Unrealized Losses on Securities Minimum Pension Liability Adjustments 33