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Financial Assets and Liabilities Subject to Recurring Fair Value Measurements (Detail) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Derivative assets | $ 94.9 | $ 207.0
Derivative liabilities | 93.0 | 46.7
Fair Value, Measurements, Recurring |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | 2,819.8 | 2,772.5
Marketable equity securities, Fair Value | 6.7 | 6.3
Total marketable securities | 2,826.5 | 2,778.8
Derivative assets | 94.9 | 207.0
Derivative liabilities | 93.0 | 46.7
Fair Value, Measurements, Recurring | Level 1 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | 242.4 | 285.7
Marketable equity securities, Fair Value | 6.7 | 6.3
Total marketable securities | 249.1 | 292.0
Fair Value, Measurements, Recurring | Level 2 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | 2,577.4 | 2,486.8
Total marketable securities | 2,577.4 | 2,486.8
Derivative assets | 94.9 | 207.0
Derivative liabilities | 93.0 | 46.7
Fair Value, Measurements, Recurring | Cross currency swaps |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Derivative assets | 75.6 | 121.3
Derivative liabilities | 46.3 | 28.7
Fair Value, Measurements, Recurring | Cross currency swaps | Level 2 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Derivative assets | 75.6 | 121.3
Derivative liabilities | 46.3 | 28.7
Fair Value, Measurements, Recurring | Interest-rate swaps |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Derivative assets | 9.2 | 10.9
Derivative liabilities | 6.6 | 12.4
Fair Value, Measurements, Recurring | Interest-rate swaps | Level 2 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Derivative assets | 9.2 | 10.9
Derivative liabilities | 6.6 | 12.4
Fair Value, Measurements, Recurring | Foreign-exchange contracts |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Derivative assets | 9.9 | 74.8
Derivative liabilities | 38.7 | 5.6
Fair Value, Measurements, Recurring | Foreign-exchange contracts | Level 2 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Derivative assets | 9.9 | 74.8
Derivative liabilities | 38.7 | 5.6
Fair Value, Measurements, Recurring | Commodity contracts |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Derivative assets | 0.2 |
Derivative liabilities | 1.4 |
Fair Value, Measurements, Recurring | Commodity contracts | Level 2 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Derivative assets | 0.2 |
Derivative liabilities | 1.4 |
U.S. tax-exempt securities | Fair Value, Measurements, Recurring |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | 296.8 | 303.7
U.S. tax-exempt securities | Fair Value, Measurements, Recurring | Level 2 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | 296.8 | 303.7
U.S. taxable municipal / non-U.S. provincial bonds | Fair Value, Measurements, Recurring |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | 402.2 | 380.1
U.S. taxable municipal / non-U.S. provincial bonds | Fair Value, Measurements, Recurring | Level 2 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | 402.2 | 380.1
U.S. corporate securities | Fair Value, Measurements, Recurring |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | 908.6 | 864.2
U.S. corporate securities | Fair Value, Measurements, Recurring | Level 2 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | 908.6 | 864.2
U.S. government securities | Fair Value, Measurements, Recurring |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | 242.4 | 285.7
U.S. government securities | Fair Value, Measurements, Recurring | Level 1 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | 242.4 | 285.7
Non-U.S. corporate securities | Fair Value, Measurements, Recurring |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | 609.2 | 608.1
Non-U.S. corporate securities | Fair Value, Measurements, Recurring | Level 2 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | 609.2 | 608.1
Non-U.S. government securities | Fair Value, Measurements, Recurring |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | 179.4 | 164.3
Non-U.S. government securities | Fair Value, Measurements, Recurring | Level 2 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | 179.4 | 164.3
Other debt securities | Fair Value, Measurements, Recurring |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | 181.2 | 166.4
Other debt securities | Fair Value, Measurements, Recurring | Level 2 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable debt securities | $ 181.2 | $ 166.4

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