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v3.22.4

Segment information - Reconciliation of Total Business Segment Assets to Consolidated Assets (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Cash and cash equivalents | $ 391.8 | $ 552.9 | $ 898.5
Deferred income taxes | 118.6 | 125.3 | 136.2
Operating lease right-of-use assets | 42.5 | 62.7 | 79.3
Prepaid postretirement assets | 119.5 | 159.7 | 187.5
Other corporate assets | 96.8 | 206.9 | 298.8
Total assets | 2,065.6 | 2,419.5 | 2,707.9
Operating Segments |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Total assets | 1,190.6 | 1,237.2 | 1,003.5
Other corporate assets |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Other corporate assets | $ 105.8 | $ 74.8 | $ 104.1

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. 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