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OTHER COMPREHENSIVE INCOME - Changes in Accumulated Other Comprehensive Income, Net of Tax (Details)
$ in Millions
 6 Months Ended
Jun. 30, 2024
USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]  
Balance at beginning of period $ 7,507.9
Balance at end of period 7,730.4
Total  
AOCI Attributable to Parent, Net of Tax [Roll Forward]  
Balance at beginning of period (143.8)
Amounts reclassified from AOCI 3.2
Balance at end of period (140.6)
Cash Flow Hedges  
AOCI Attributable to Parent, Net of Tax [Roll Forward]  
Balance at beginning of period (19.4)
Amounts reclassified from AOCI 0.8
Balance at end of period (18.6)
Pension and Postretirement Benefit Plans  
AOCI Attributable to Parent, Net of Tax [Roll Forward]  
Balance at beginning of period (124.4)
Amounts reclassified from AOCI 2.4
Balance at end of period $ (122.0)