Components of net periodic costs. For the three and six months ended April 30, 2011 and 2010, our net pension and post retirement benefit costs were comprised of the following:

As of April 1, 2011, we approved changes to our U.S. Post-Retirement Benefit Plan. In connection with these changes, we reduced our Accumulated Prospective Benefit Obligation by $194 million with the offset going to accumulated other comprehensive income.  The prior service credit will be amortized over the future working lifetime of all participants in the plan which is approximately 9 years.

We contributed approximately $30 million to our U.S. defined benefit plans and $21 million to our non-U.S. defined benefit plans during the three months ended April 30, 2011 and $33 million and $34 million, respectively, for the six months ended April 30, 2011.  We contributed approximately $30 million to our U.S. defined benefit plans and $10 million to our non-U.S. defined benefit plans during the three months ended April 30, 2010 and $32 million and $22 million, respectively, for the six months ended April 30, 2010.  We expect to contribute approximately zero to our U.S. defined benefit plans and $30 million to our non-U.S. defined benefit plans during the remainder of 2011.