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Debt Debt - Minimum Repayments Long Term Debt (Details)
$ in Millions
Dec. 31, 2018
USD ($)
Debt Instrument [Line Items]  
2019 $ 53.5
2020 49.8
2021 46.7
2022 753.4
2023 16.2
Later years 615.3
Total 1,534.9
Capital leases  
Debt Instrument [Line Items]  
2019 25.1
2020 23.5
2021 21.7
2022 19.7
2023 16.2
Later years 14.3
Total 120.5
Other long-term debt  
Debt Instrument [Line Items]  
2019 28.4
2020 26.3
2021 25.0
2022 733.7
2023 0.0
Later years 601.0
Total $ 1,414.4