Investments in Affiliated Companies (Balance Sheet, Affiliates) (Details 5) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Total Assets	$ 8,937.6	$ 8,285.1	$ 7,318.9
Shareholders’ equity	1,957.4	1,835.1	$ 1,788.1
Total Liabilities and Shareholders’ Equity	8,937.6	8,285.1
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Schedule of Equity Method Investments [Line Items]
Current assets	352.7	203.6
Noncurrent assets	4,766.9	5,015.9
Total Assets	5,119.6	5,219.5
Current liabilities	311.0	525.5
Liabilities, Noncurrent	3,674.7	3,703.6
Shareholders’ equity	1,133.9	990.4
Total Liabilities and Shareholders’ Equity	$ 5,119.6	$ 5,219.5