	Effect on
Pension Expense in 2008	Pension Benefit Obligation at December 31, 2008
Millions of dollars
25-basis-point decrease in discount rate	$ 4	$ 30
25-basis-point increase in discount rate	$ (4)	$ (28)

Effect on

Pension Expense
in 2008

Pension Benefit Obligation
at December 31, 2008

Millions of dollars

25-basis-point decrease in discount rate

$ 4

$ 30

25-basis-point increase in discount rate

$ (4)

$ (28)