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Other Assets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Capitalized software costs, net of accumulated amortization	$ 13.9	$ 12.9
Grantor trust assets	21.6	18.0
Net pension assets	26.3	9.3
Long-term supplies inventory	4.9	6.6
Operating lease assets	25.1	19.8
Other assets	9.3	2.6
Total	$ 101.1	$ 69.2

X

- Definition

The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

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Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans.

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Inventories not expected to be converted to cash, sold or exchanged within the normal operating cycle.

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Amount of lessee's right to use underlying asset under operating lease.

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Amount of other miscellaneous assets.

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Amount of noncurrent assets classified as other.

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