Debt and Credit Facilities (Short-Term Borrowings and Current Maturities of Long-Term Debt) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Short-term Debt [Line Items]
Short-term borrowings and current maturities of long-term debt	$ 801.9	$ 1,048.0
put options exercised	45.8
Debentures With Put Feature [Member]
Short-term Debt [Line Items]
Short-term borrowings and current maturities of long-term debt	295.0	340.8
Other Current Maturities of Long Term Debt [Member]
Short-term Debt [Line Items]
Short-term borrowings and current maturities of long-term debt	7.5	$ 7.5
4.250% Senior Notes Due 2013 [Member]
Short-term Debt [Line Items]
Debt instrument, interest rate		4.25%
Short-term borrowings and current maturities of long-term debt	$ 0.0	$ 699.7
3.55% Senior Notes due 2024 [Member]
Short-term Debt [Line Items]
Debt instrument, interest rate	3.55%
Three Point Five Five Percent Senior Notes Due Two Thousand Twenty Four
Short-term Debt [Line Items]
Short-term borrowings and current maturities of long-term debt	$ 499.4	$ 0.0