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Stockholders' Equity (Contracts' Value Allocated To Cost Of Shares Repurchased And To The Value Of The ASR Forward Contracts) (Details) (USD $)
In Millions, unless otherwise specified |
9 Months Ended |
|---|---|
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Jan. 27, 2012
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|
| Accelerated Share Repurchases [Line Items] | |
| Repurchase and retirement of common stock, shares | (14.6) |
| Repurchase and retirement of common stock | $ (599.9) |
| Value of ASR forward contracts | (0.1) |
| Total cash payment | (600.0) |
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Shares Of Common Stock [Member]
|
|
| Accelerated Share Repurchases [Line Items] | |
| Repurchase and retirement of common stock, shares | (14.6) |
| Total cash payment, shares | (14.6) |
|
Additional Paid-In Capital [Member]
|
|
| Accelerated Share Repurchases [Line Items] | |
| Repurchase and retirement of common stock | (125.8) |
| Value of ASR forward contracts | (0.1) |
| Total cash payment | (125.9) |
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Retained Earnings [Member]
|
|
| Accelerated Share Repurchases [Line Items] | |
| Repurchase and retirement of common stock | (474.1) |
| Total cash payment | $ (474.1) |