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Fair Value Measurements (Debt Instruments) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Long-term debt |  | $ 3,422.4 | $ 2,695.7
€15.0 million fixed rate notes due May 2023 [Member] |  |  |
Long-term debt |  | 0.0 | 16.8
$750.0 Million Fixed Rate Notes Due March 2025, Interest Equal To 3.00% [Member] |  |  |
Long-term debt | [1] | 748.4 | 747.7
$500.0 Million Fixed Rate Notes Due June 2028, Interest Equal To 3.75% [Member] [Domain] |  |  |
Long-term debt |  | 497.7 | 497.2
$750.0 million Fixed Rate Notes Due September 2043 Interest Equal To 5.3% [Member] |  |  |
Long-term debt | [2] | 743.7 | 743.4
$700.0 Million Fixed Rate Notes Due June 2048, Interest Equal To 4.15% [Member] [Domain] [Domain] |  |  |
Long-term debt |  | 690.9 | 690.6
$750.0 Million Fixed Rate Notes Due March 2032, Interest Equal To 2.65% |  |  |
Long-term debt |  | 741.7 | $ 0.0
Fair Value, Inputs, level 2 [Member] | €15.0 million fixed rate notes due May 2023 [Member] |  |  |
Debt Instrument, Fair Value Disclosure |  | 16.1 |
Fair Value, Inputs, level 2 [Member] | $750.0 Million Fixed Rate Notes Due March 2025, Interest Equal To 3.00% [Member] |  |  |
Debt Instrument, Fair Value Disclosure |  | 726.6 |
Fair Value, Inputs, level 2 [Member] | $500.0 Million Fixed Rate Notes Due June 2028, Interest Equal To 3.75% [Member] [Domain] |  |  |
Debt Instrument, Fair Value Disclosure |  | 490.9 |
Fair Value, Inputs, level 2 [Member] | $750.0 million Fixed Rate Notes Due September 2043 Interest Equal To 5.3% [Member] |  |  |
Debt Instrument, Fair Value Disclosure |  | 786.6 |
Fair Value, Inputs, level 2 [Member] | $700.0 Million Fixed Rate Notes Due June 2048, Interest Equal To 4.15% [Member] [Domain] [Domain] |  |  |
Debt Instrument, Fair Value Disclosure |  | 633.0 |
Fair Value, Inputs, level 2 [Member] | $750.0 Million Fixed Rate Notes Due March 2032, Interest Equal To 2.65% |  |  |
Debt Instrument, Fair Value Disclosure |  | $ 633.2 |
[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%

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