v3.26.1
Financial Instruments and Hedging Activities (Fair Values of Derivative Instruments Included on Consolidated Balance Sheet) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Derivatives, Fair Value [Line Items]    
Asset Derivatives Fair Value $ 144.0 $ 131.0
Liability Derivatives Fair Value (96.0) (145.0)
Other long-term liabilities 686.0 704.0
Prepaid expenses and other current assets 1,046.0 863.0
Accrued payroll and other liabilities 1,257.0 1,488.0
Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Asset Derivatives Fair Value 68.0 27.0
Liability Derivatives Fair Value (96.0) (145.0)
Derivatives Not Designated as Hedging Instruments    
Derivatives, Fair Value [Line Items]    
Asset Derivatives Fair Value 76.0 104.0
Liability Derivatives Fair Value 0.0 0.0
Foreign Exchange [Member] | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Other long-term liabilities (7.0) (12.0)
Other Assets 31.0 24.0
Prepaid expenses and other current assets 37.0 3.0
Accrued payroll and other liabilities (75.0) (117.0)
Equity [Member] | Derivatives Not Designated as Hedging Instruments    
Derivatives, Fair Value [Line Items]    
Other Assets 76.0 104.0
Interest Rate Contract [Member] | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Other long-term liabilities (14.0) (16.0)
Other Assets $ 0.0 $ 0.0