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CAPITAL CONSTRUCTION FUND (Tables)
6 Months Ended
Jun. 30, 2024
CAPITAL CONSTRUCTION FUND  
Schedule of capital construction fund

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Six Months Ended

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​

June 30, 

(In millions)

    

2024

    

2023

CCF Cash and Cash Equivalents:

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​

​

​

​

​

CCF cash balance at beginning of period

​

$

596.7

​

$

518.2

Cash deposits into the CCF

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​

—

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​

100.0

Cash paid for purchase of U.S. Treasury debt securities and accrued interest

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​

(449.8)

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​

—

Interest income deposited into the CCF

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​

11.0

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​

13.1

Repurchase of assigned accounts receivable

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​

35.8

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​

—

Qualifying withdrawal payments out of the CCF

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​

(35.8)

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​

(49.9)

Total CCF cash balance at end of period

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​

157.9

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​

581.4

Accrued interest earned on CCF Cash and Investments at end of period

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​

2.7

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​

2.5

Total CCF cash and cash equivalents balance at end of period

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​

160.6

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583.9

CCF Investments:

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CCF investments balance at beginning of period

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​

—

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—

Purchase of U.S. Treasury debt securities

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448.1

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—

Accretion of investments

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​

5.2

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—

Total CCF investments balance at end of period

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​

453.3

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​

—

Total CCF cash and cash equivalents, and investments balance at end of period

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$

613.9

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$

583.9

Schedule of maturities of capital construction fund investments

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As of

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June 30, 2024

Year (in millions)

    

Cost

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Fair Value

Remainder of 2024

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$

47.4

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$

47.3

2025

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188.0

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187.1

2026

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165.7

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164.4

2027

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52.2

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51.8

Total CCF investments

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$

453.3

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$

450.6

Schedule of CCF assigned accounts receivable

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Six Months Ended

​

​

June 30, 

(In millions)

    

2024

    

2023

CCF assigned accounts receivable balance at beginning of period

​

$

218.1

​

$

9.9

Assigned accounts receivable

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​

—

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​

200.0

Repurchase of assigned accounts receivable

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(35.8)

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​

—

Interest earned on assigned accounts receivable

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​

3.6

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​

0.1

CCF assigned accounts receivable balance at end of period

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$

185.9

​

$

210.0