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Debt (Tables)
3 Months Ended
Mar. 31, 2023
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments [Table Text Block]
Long-term debt consisted of the following at March 31, 2023 and December 31, 2022: 
(in millions)March 31, 2023December 31, 2022
$750.0 million fixed rate notes due March 2025, stated rate of 3.00% (1)
$748.6 $748.4 
$500.0 million fixed rate notes due June 2028, stated rate of 3.75%497.8 497.7 
$750.0 million fixed rate notes due March 2032, stated rate of 2.65%
742.0 741.7 
$750.0 million fixed rate notes due September 2043, stated rate of 5.30% (2)
743.7 743.7 
$700.0 million fixed rate notes due June 2048, stated rate of 4.15%691.0 690.9 
Total long-term debt$3,423.1 $3,422.4 
(1)The company maintained a forward-starting interest rate swap agreement that modified the interest obligation associated with these notes so that the interest payable on the notes effectively became fixed at a rate of 3.11%.
(2)The company maintained a forward-starting interest rate swap agreement that modified the interest obligation associated with these notes so that the interest payable on the notes effectively became fixed at a rate of 4.73%.
Schedule of Maturities of Long-term Debt [Table Text Block]
Long-term debt maturities, at par value (in U.S. dollar equivalent), were as follows at March 31, 2023:  
(in millions)Par Value
2024$— 
2025750.0 
2026— 
2027— 
2028— 
Thereafter2,700.0 
Schedule of Short-term Debt
Short-term debt consisted of the following at March 31, 2023 and December 31, 2022:
(in millions)March 31, 2023December 31, 2022
€15.0 million fixed rate notes due May 2023, stated rate of 4.30%$16.3 $16.0 
Total short-term debt$16.3 $16.0