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PENSION PLANS | 6 Months Ended
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Oct. 30, 2011
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] |
PENSION PLANS | PENSION PLANS The components of net periodic pension cost consist of:
|  | Three Months Ended |  | Six Months Ended
|  | October 30, 2011 |  | October 31, 2010 |  | October 30, 2011 |  | October 31, 2010
|  | (in millions) |  | (in millions)
Service cost |  | $ | 9.4 |  |  | $ | 9.3 |  |  | $ | 18.7 |  |  | $ | 18.5 |
Interest cost |  | 19.0 |  |  | 18.7 |  |  | 38.0 |  |  | 37.5 |
Expected return on plan assets |  | (19.9 | ) |  | (16.0 | ) |  | (39.8 | ) |  | (32.0 | )
Net amortization |  | 5.8 |  |  | 8.5 |  |  | 11.7 |  |  | 17.0 |
Net periodic pension cost |  | $ | 14.3 |  |  | $ | 20.5 |  |  | $ | 28.6 |  |  | $ | 41.0 |
In June 2011 (fiscal 2012), we made a voluntary contribution of $100.0 million to our qualified pension plans above the minimum amount required under government regulations. As a result of the voluntary contribution, we now expect employer contributions to our qualified pension plans for fiscal 2012 to total approximately $140.0 million.

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