v3.26.3
Comprehensive Loss (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Other comprehensive earnings (loss) before reclassifications, before tax $ 5.4 $ (41.2) $ (97.9) $ 394.3
Net other comprehensive earnings (loss), before tax 5.6 (40.8) (90.1) 380.7
Income tax provision (benefit) 2.9 8.0 25.0 (119.0)
Change in unrecognized (loss) gain and prior service cost related to defined benefit plans 0.0 (3.9) (4.2) (3.6)
Pension and other postretirement benefits        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Amortization of prior service costs 0.6 0.0 1.9 0.0
Gains and Losses on Derivatives in Cash Flow Hedging Relationships        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at December 31, 2025, net of tax 7.2 (12.8) (3.1) 32.3
Other comprehensive earnings (loss) before reclassifications, before tax (2.4) 8.2 0.6 (40.1)
Net other comprehensive earnings (loss), before tax (0.6) 11.5 13.2 (45.0)
Income tax provision (benefit) (0.2) 2.9 3.3 (8.5)
Balance at September 30, 2026, net of tax 6.8 (4.2) 6.8 (4.2)
Gains and Losses on Derivatives in Cash Flow Hedging Relationships | Foreign currency forward contracts        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Amounts reclassified from accumulated other comprehensive (loss) earnings, before tax: 2.0 2.1 10.7 (8.5)
Gains and Losses on Derivatives in Cash Flow Hedging Relationships | Interest rate swaps        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Amounts reclassified from accumulated other comprehensive (loss) earnings, before tax: (0.2) 1.2 1.9 3.6
Gains and Losses on Net Investment Hedges        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at December 31, 2025, net of tax 175.5 80.2 105.1 492.6
Other comprehensive earnings (loss) before reclassifications, before tax 13.5 25.3 103.4 (503.6)
Net other comprehensive earnings (loss), before tax     103.4 (503.6)
Income tax provision (benefit) 2.9 5.5 22.4 (111.0)
Balance at September 30, 2026, net of tax 186.1 100.0 186.1 100.0
Gains and Losses on Available-For-Sale Fixed Income Securities        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at December 31, 2025, net of tax (0.9) (0.6) (0.4) (1.2)
Other comprehensive earnings (loss) before reclassifications, before tax (1.2) 0.3 (1.8) 1.1
Net other comprehensive earnings (loss), before tax     (1.8)  
Income tax provision (benefit) (0.3) 0.1 (0.4) 0.3
Balance at September 30, 2026, net of tax (1.8) (0.4) (1.8) (0.4)
Defined Pension Plan Items        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at December 31, 2025, net of tax 276.2 253.8 279.6 254.2
Other comprehensive earnings (loss) before reclassifications, before tax 1.6 (1.0) 0.6 5.1
Net other comprehensive earnings (loss), before tax   (3.9)    
Income tax provision (benefit) 0.5 (0.5) (0.3) 0.2
Balance at September 30, 2026, net of tax 275.7 250.4 275.7 250.4
Defined Pension Plan Items | Reclassification out of Accumulated Other Comprehensive Income [Member] | Pension and other postretirement benefits        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Amortization of prior service costs 0.6   1.9  
Foreign Currency Translation Adjustment        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at December 31, 2025, net of tax (3,282.8) (2,985.0) (3,088.2) (3,990.8)
Other comprehensive earnings (loss) before reclassifications, before tax (6.1) (74.0) (200.7) 931.8
Net other comprehensive earnings (loss), before tax (6.1) (74.0) (200.7) 931.8
Income tax provision (benefit) 0.0 0.0 0.0 0.0
Balance at September 30, 2026, net of tax (3,288.9) (3,059.0) (3,288.9) (3,059.0)
Totals        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at December 31, 2025, net of tax (2,824.8) (2,664.4) (2,707.0) (3,212.9)
Balance at September 30, 2026, net of tax (2,822.1) (2,713.2) (2,822.1) (2,713.2)
Totals | Reclassification out of Accumulated Other Comprehensive Income [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Amortization of prior service costs 0.6   1.9  
Amortization of actuarial gain included in SG&A        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Amounts reclassified from accumulated other comprehensive (loss) earnings, before tax: $ (2.2) $ (2.9) $ (6.7) $ (8.7)