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Investments
6 Months Ended
Dec. 25, 2022
Investments, Debt and Equity Securities [Abstract]  
Investments Investments
Short-term investments consisted of the following (in millions of U.S. Dollars):
 December 25, 2022
 Amortized CostGross Unrealized GainsGross Unrealized LossesCredit Loss AllowanceEstimated Fair Value
Corporate bonds$618.2 $0.1 ($20.2)$— $598.1 
U.S. treasury securities251.2 — (1.1)— 250.1 
Certificates of deposit196.9 — — — 196.9 
Municipal bonds180.6 0.1 (5.0)— 175.7 
Variable rate demand notes94.4 — — — 94.4 
Commercial paper64.0 — — — 64.0 
U.S. agency securities20.2 — (0.1)— 20.1 
Total short-term investments$1,425.5 $0.2 ($26.4)$— $1,399.3 
 June 26, 2022
 Amortized CostGross Unrealized GainsGross Unrealized LossesCredit Loss AllowanceEstimated Fair Value
Corporate bonds$465.8 $— ($17.8)$— $448.0 
Municipal bonds166.5 0.1 (4.4)— 162.2 
U.S. treasury securities66.5 — (0.7)— 65.8 
Variable rate demand notes69.4 — — — 69.4 
U.S. agency securities4.0 — (0.1)— 3.9 
Total short-term investments$772.2 $0.1 ($23.0)$— $749.3 
All short-term investments are classified as available-for-sale. The Company did not have any long-term investments as of December 25, 2022 and June 26, 2022.
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 (in millions of U.S. Dollars):
December 25, 2022
Less than 12 MonthsGreater than 12 MonthsTotal
Fair ValueUnrealized LossFair ValueUnrealized LossFair ValueUnrealized Loss
Corporate bonds$361.0 ($12.1)$146.4 ($8.1)$507.4 ($20.2)
Municipal bonds108.5 (3.2)35.7 (1.8)144.2 (5.0)
U.S. treasury securities133.6 (1.1)— — 133.6 (1.1)
U.S. agency securities5.0 — 1.9 (0.1)6.9 (0.1)
Total$608.1 ($16.4)$184.0 ($10.0)$792.1 ($26.4)
Number of securities with an unrealized loss265 90 355 
June 26, 2022
Less than 12 MonthsGreater than 12 MonthsTotal
Fair ValueUnrealized LossFair ValueUnrealized LossFair ValueUnrealized Loss
Corporate bonds$431.1 ($17.4)$8.3 ($0.4)$439.4 ($17.8)
Municipal bonds150.0 (4.4)1.0 — 151.0 (4.4)
U.S. treasury securities65.8 (0.7)— — 65.8 (0.7)
U.S. agency securities3.9 (0.1)— — 3.9 (0.1)
Total$650.8 ($22.6)$9.3 ($0.4)$660.1 ($23.0)
Number of securities with an unrealized loss346 351 
Additionally, the Company held cash equivalent securities in unrealized loss positions as of December 25, 2022 and June 26, 2022. As of December 25, 2022, the Company held ten cash equivalent securities in unrealized loss positions with an aggregate fair value of $104.7 million and an aggregate unrealized loss of less than $0.1 million. As of June 26, 2022, the Company held six cash equivalent securities in unrealized loss positions with an aggregate fair value of $69.0 million and an aggregate unrealized loss of less than $0.1 million. All cash equivalents in unrealized loss positions as of December 25, 2022 and June 26, 2022 have been in unrealized loss positions for less than 12 months.
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 $11.2 million and $5.9 million as of December 25, 2022 and June 26, 2022, 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 25, 2022 and December 26, 2021.
The Company utilizes specific identification in computing realized gains and losses on the sale of investments. Realized gains and losses are included in non-operating (income) 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 25, 2022 until the investments fully recover in market value. No allowance for credit losses was recorded as of December 25, 2022.
The contractual maturities of short-term investments as of December 25, 2022 were as follows:

 
(in millions of U.S. Dollars)Within One YearAfter One, Within Five YearsAfter Five, Within Ten YearsAfter Ten YearsTotal
Corporate bonds$298.0 $300.1 $— $— $598.1 
U.S. treasury securities196.8 53.3 — — 250.1 
Certificates of deposit196.9 — — — 196.9 
Municipal bonds66.1 109.6 — — 175.7 
Variable rate demand notes— — 14.7 79.7 94.4 
Commercial paper64.0 — — — 64.0 
U.S. agency securities15.1 5.0 — — 20.1 
Total short-term investments$836.9 $468.0 $14.7 $79.7 $1,399.3