As of December 31,

2023

2022

(In millions of dollars)

Trade Receivables, Net

Billed trade receivables

$

325.8

$

297.7

Allowance for doubtful receivables

(0.6

)

(0.5

)

Trade receivables, net

$

325.2

$

297.2

Inventories

Finished products

$

89.3

$

98.0

Work-in-process

210.8

242.5

Raw materials

161.5

174.0

Operating supplies

15.6

10.9

Inventories

$

477.2

$

525.4

Property, Plant and Equipment, Net

Land and improvements

$

38.0

$

28.4

Buildings and leasehold improvements

238.4

185.5

Machinery and equipment

1,265.3

1,232.7

Construction in progress

173.7

141.3

Property, plant and equipment, gross

1,715.4

1,587.9

Accumulated depreciation and amortization

(663.7

)

(574.9

)

Land held for sale

0.4

0.2

Property, plant and equipment, net

$

1,052.1

$

1,013.2

Other Assets

Assets to be conveyed associated with Warrick acquisition

$

56.8

$

56.8

Restricted cash – Note 16

18.3

13.9

Long-term replacement parts

16.7

15.5

Other

25.9

26.1

Other assets

$

117.7

$

112.3

.

Other Accrued Liabilities

Uncleared cash disbursements

$

15.7

$

13.6

Accrued income taxes and other taxes payable

9.5

8.9

Accrued annual contribution to Salaried VEBA – Note 5

1.1

—

Accrued interest

9.9

9.9

Short-term environmental accrual – Note 10

2.8

1.1

Current operating lease liabilities – Note 3

8.0

9.1

Current finance lease liabilities – Note 3

2.1

2.1

Other – Note 8

15.2

23.7

Other accrued liabilities

$

64.3

$

68.4

Long-Term Liabilities

Workers' compensation accrual

$

29.9

$

30.9

Long-term environmental accrual – Note 10

14.2

16.6

Other long-term liabilities

37.6

27.2

Long-term liabilities

$

81.7

$

74.7