Revenue - Accounts Receivable and Current and Long-Term Contract Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Accounts Receivable, Less Allowance	$ 2,467.9	$ 2,563.6	$ 2,352.4
Contract Assets (Current)	46.2	43.8
Contract Assets (Long-Term)	151.7	117.7
Contract Liabilities (Current)	365.7	292.9
Contract Liabilities (Long-Term)	$ 3.8	$ 7.1