XML 142 R119.htm IDEA: XBRL DOCUMENT 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