REVENUE - Schedule of Accounts Receivable and Current and Long-term Contract Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025
Revenue from Contract with Customer [Abstract]
Accounts Receivable, Less Allowance	$ 3,571.2	$ 2,791.2	$ 3,111.9
Contract Assets (Current)	111.4	73.3	85.9
Contract Assets (Long-Term)	207.9	227.7	247.7
Contract Liabilities (Current)	367.9	427.3	304.0
Contract Liabilities (Long-Term)	$ 5.8	$ 10.3	$ 14.8