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Pension and Other Postretirement Benefit Plans
3 Months Ended
Jun. 30, 2011
Pension and Other Postretirement Benefit Plans [Abstract]  
Pension and Other Postretirement Benefit Plans
7. Pension and Other Postretirement Benefit Plans
     Net periodic expense for the Company’s defined pension and other postretirement benefit plans was $11 million and $10 million for the first quarters of 2012 and 2011. Cash contributions to these plans for both the first quarters of 2012 and 2011 were $5 million.