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Shareholders' Equity (Narrative) (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended |
--- | --- | ---
Sep. 28, 2018 | Jun. 29, 2018 | Mar. 30, 2018 | Nov. 30, 2017
Two Thousand Seventeen Stock Repurchase Program [Member] |  |  |  |
Equity, Class of Stock [Line Items] |  |  |  |
Stock repurchase program approved amount |  |  |  | $ 600.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ 392.2 |  |  |
Retained Earnings [Member] |  |  |  |
Equity, Class of Stock [Line Items] |  |  |  |
Stock Repurchased During Period, Value |  |  | $ 42.5 |
Open Market Purchases [Member] | Two Thousand Seventeen Stock Repurchase Program [Member] |  |  |  |
Equity, Class of Stock [Line Items] |  |  |  |
Stock Repurchased During Period, Shares | 0.0 | 0.0 | 1.3 |
Accelerated Share Repurchases, Final Price Paid Per Share |  |  | $ 39.43 |
Stock Repurchased During Period, Value |  |  | $ 50.0 |

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- Definition Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653 + Details
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- Definition Number of shares that have been repurchased and retired during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
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