Acquisitions - Additional Information (Detail) - USD ($)
|
3 Months Ended |
9 Months Ended |
|
Jan. 30, 2016 |
Aug. 01, 2015 |
Jan. 24, 2015 |
Jan. 30, 2016 |
Jan. 24, 2015 |
Apr. 25, 2015 |
| Business Acquisition [Line Items] |
|
|
|
|
|
|
| Goodwill |
$ 815,316,000
|
|
|
$ 815,316,000
|
|
$ 299,924,000
|
| Revenues |
1,400,853,000
|
|
$ 958,628,000
|
3,932,933,000
|
$ 2,875,804,000
|
|
| Operating income |
$ 95,729,000
|
|
$ 77,377,000
|
241,369,000
|
215,513,000
|
|
| Tax impact of repatriation of foreign earnings |
|
|
|
|
$ 12,300,000
|
|
| Animal Health International [Member] |
|
|
|
|
|
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| Business Acquisition [Line Items] |
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|
|
|
|
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| Business acquisition cash paid |
|
$ 1,106,583,000
|
|
|
|
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| Identifiable net assets acquired |
|
$ 588,213,000
|
|
|
|
|
| Revision period after valuation completion for provisional amounts |
|
1 year
|
|
|
|
|
| Deferred tax asset |
|
$ 2,569,000
|
|
|
|
|
| Deferred tax liability |
|
177,789,000
|
|
|
|
|
| Goodwill |
|
518,370,000
|
|
|
|
|
| Goodwill recognized, deductible for income tax purpose |
|
0
|
|
|
|
|
| Deferred taxes recorded related to goodwill |
|
0
|
|
|
|
|
| Revenues |
|
|
|
992,538,000
|
|
|
| Operating income |
|
|
|
22,196,000
|
|
|
| Amortization expense related to identifiable intangible assets |
|
|
|
20,080,000
|
|
|
| Tax impact of repatriation of foreign earnings |
|
|
|
$ 12,300,000
|
|
|
| Animal Health International [Member] | Term Loan [Member] |
|
|
|
|
|
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| Business Acquisition [Line Items] |
|
|
|
|
|
|
| Unsecured term loan |
|
1,000,000,000
|
|
|
|
|
| Animal Health International [Member] | Unsecured Revolving Line of Credit [Member] |
|
|
|
|
|
|
| Business Acquisition [Line Items] |
|
|
|
|
|
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| Maximum borrowing capacity |
|
$ 500,000,000
|
|
|
|
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