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Investments | 6 Months Ended
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Dec. 26, 2021
Investments, Debt and Equity Securities [Abstract] |
Investments | Investments Investments consist of municipal bonds, corporate bonds, U.S. agency securities, U.S. treasury securities, certificates of deposit, commercial paper and variable rate demand notes. All short-term investments are classified as available-for-sale. Short-term investments as of December 26, 2021 and June 27, 2021 consisted of the following:
|  | December 26, 2021
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Credit Loss Allowance |  | Estimated Fair Value
Municipal bonds |  | $132.4 |  |  | $1.1 |  |  | ($0.3) |  |  | $— |  |  | $133.2 |
Corporate bonds |  | 312.4 |  |  | 1.1 |  |  | (1.3) |  |  | — |  |  | 312.2 |
U.S. agency securities |  | 4.0 |  |  | — |  |  | — |  |  | — |  |  | 4.0 |
U.S. treasury securities |  | 12.7 |  |  | 0.1 |  |  | — |  |  | — |  |  | 12.8 |
Commercial paper |  | 21.0 |  |  | — |  |  | — |  |  | — |  |  | 21.0 |
Variable rate demand notes |  | 17.9 |  |  | — |  |  | — |  |  | — |  |  | 17.9 |
Total short-term investments |  | $500.4 |  |  | $2.3 |  |  | ($1.6) |  |  | $— |  |  | $501.1 |
|  | June 27, 2021
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Credit Loss Allowance |  | Estimated Fair Value
Municipal bonds |  | $139.4 |  |  | $1.9 |  |  | $— |  |  | $— |  |  | $141.3 |
Corporate bonds |  | 456.5 |  |  | 3.3 |  |  | (0.3) |  |  | — |  |  | 459.5 |
U.S. agency securities |  | 15.8 |  |  | — |  |  | — |  |  | — |  |  | 15.8 |
U.S. treasury securities |  | 72.3 |  |  | 0.3 |  |  | (0.1) |  |  | — |  |  | 72.5 |
Certificates of deposit |  | 16.5 |  |  | — |  |  | — |  |  | — |  |  | 16.5 |
Commercial paper |  | 50.0 |  |  | — |  |  | — |  |  | — |  |  | 50.0 |
Variable rate demand notes |  | 20.0 |  |  | — |  |  | — |  |  | — |  |  | 20.0 |
Total short-term investments |  | $770.5 |  |  | $5.5 |  |  | ($0.4) |  |  | $— |  |  | $775.6 |
The Company does not include accrued interest in estimated fair values of short-term investments and does not record an allowance for credit losses on receivables related to accrued interest. Accrued interest receivable was $3.9 million and $5.5 million as of December 26, 2021 and June 27, 2021, respectively, and is recorded in other current assets on the consolidated balance sheets. When necessary, write-offs of noncollectable interest income are recorded as a reversal to interest income. There were no write-offs of noncollectable interest income during the three and six months ended December 26, 2021 and December 27, 2020. The following tables present the gross unrealized losses and estimated fair value of the Company’s short-term investments, aggregated by investment type and the length of time that individual securities have been in a continuous unrealized loss position:
|  | December 26, 2021
|  | Less than 12 Months |  | Greater than 12 Months |  | Total
|  | Fair Value |  | Unrealized Loss |  | Fair Value |  | Unrealized Loss |  | Fair Value |  | Unrealized Loss
Municipal bonds |  | $41.8 |  |  | ($0.3) |  |  | $— |  |  | $— |  |  | $41.8 |  |  | ($0.3) |
Corporate bonds |  | 180.3 |  |  | (1.3) |  |  | — |  |  | — |  |  | 180.3 |  |  | (1.3) |
U.S. agency securities |  | 4.0 |  |  | — |  |  | — |  |  | — |  |  | 4.0 |  |  | — |
U.S. treasury securities |  | 2.0 |  |  | — |  |  | — |  |  | — |  |  | 2.0 |  |  | — |
Total |  | $228.1 |  |  | ($1.6) |  |  | $— |  |  | $— |  |  | $228.1 |  |  | ($1.6) |
Number of securities with an unrealized loss |  |  |  | 111 |  |  |  |  | — |  |  |  |  | 111 |
|  | June 27, 2021
|  | Less than 12 Months |  | Greater than 12 Months |  | Total
|  | Fair Value |  | Unrealized Loss |  | Fair Value |  | Unrealized Loss |  | Fair Value |  | Unrealized Loss
Municipal bonds |  | $28.8 |  |  | $— |  |  | $— |  |  | $— |  |  | $28.8 |  |  | $— |
Corporate bonds |  | 133.8 |  |  | (0.3) |  |  | — |  |  | — |  |  | 133.8 |  |  | (0.3) |
U.S. agency securities |  | 16.7 |  |  | — |  |  | — |  |  | — |  |  | 16.7 |  |  | — |
U.S. treasury securities |  | 47.9 |  |  | (0.1) |  |  | — |  |  | — |  |  | 47.9 |  |  | (0.1) |
Certificates of deposit |  | 0.7 |  |  | — |  |  | — |  |  | — |  |  | 0.7 |  |  | — |
Total |  | $227.9 |  |  | ($0.4) |  |  | $— |  |  | $— |  |  | $227.9 |  |  | ($0.4) |
Number of securities with an unrealized loss |  |  |  | 134 |  |  |  |  | — |  |  |  |  | 134 |
The Company utilizes specific identification in computing realized gains and losses on the sale of investments. Realized gains of $0.1 million and $0.3 million for the three and six months ended December 26, 2021, respectively, and $0.2 million and $0.2 million for the three and six months ended December 27, 2020, respectively, are included in non-operating expense, net in the consolidated statements of operations. Unrealized gains and losses are included as a separate component of equity, net of tax, unless the Company determines there is an expected credit loss. The Company evaluates its investments for expected credit losses. The Company believes it is able to and intends to hold each of the investments held with an unrealized loss as of December 26, 2021 until the investments fully recover in market value. No allowance for credit losses was recorded as of December 26, 2021. The contractual maturities of short-term investments as of December 26, 2021 were as follows:
|  | Within One Year |  | After One, Within Five Years |  | After Five, Within Ten Years |  | After Ten Years |  | Total
Municipal bonds |  | $36.4 |  |  | $96.8 |  |  | $— |  |  | $— |  |  | $133.2 |
Corporate bonds |  | 58.9 |  |  | 253.3 |  |  | — |  |  | — |  |  | 312.2 |
U.S. agency securities |  | 2.0 |  |  | 2.0 |  |  | — |  |  | — |  |  | 4.0 |
U.S. treasury securities |  | 4.0 |  |  | 8.8 |  |  | — |  |  | — |  |  | 12.8 |
Commercial paper |  | 21.0 |  |  | — |  |  | — |  |  | — |  |  | 21.0 |
Variable rate demand notes |  | — |  |  | — |  |  | — |  |  | 17.9 |  |  | 17.9 |
Total short-term investments |  | $122.3 |  |  | $360.9 |  |  | $— |  |  | $17.9 |  |  | $501.1 |

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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