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Accumulated Other Comprehensive Income (Loss)
9 Months Ended
Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Abstract]  
Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss)
Changes in accumulated other comprehensive income (loss), net of income taxes:
Cash
Flow
Hedge
Defined Benefit Pension Plans and Postemployment ArrangementsForeign
Currency Translation
Total
Nine Months Ended September 30, 2023
January 1$(12.1)$(41.3)$(1,384.5)$(1,437.9)
Other comprehensive income (loss) before reclassifications  (25.6)(25.6)
Reclassification from accumulated other comprehensive
   income (loss)
3.0 2.0  5.0 
September 30
$(9.1)$(39.3)$(1,410.1)$(1,458.5)
Nine Months Ended September 30, 2022
January 1$(16.1)$(90.4)$(1,145.8)$(1,252.3)
Other comprehensive income (loss) before reclassifications— — (489.7)(489.7)
Reclassification from accumulated other comprehensive
   income (loss)
3.0 4.5 — 7.5 
September 30
$(13.1)$(85.9)$(1,635.5)$(1,734.5)