CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions |
12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Statement of Comprehensive Income [Abstract] | |||||||
| Net income | $ 1,056.9 | $ 845.7 | $ 840.3 | ||||
| Change in unrealized gains on marketable securities: | |||||||
| Unrealized gains arising during the period, net of tax | 23.6 | 27.1 | 49.1 | ||||
| Gains reclassified into earnings, net of tax | [1] | [1] | 5.2 | ||||
| Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Total | 23.6 | 27.1 | 54.3 | ||||
| Change in unrealized gains (losses) on cash flow hedges: | |||||||
| Unrealized gains (losses) arising during the period, net of tax | 48.9 | (2.9) | (12.0) | ||||
| (Gains) losses reclassified into earnings, net of tax | (27.4) | 4.7 | 16.4 | ||||
| Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Total | 21.5 | 1.8 | 4.4 | ||||
| Other comprehensive income, net of tax | 45.1 | 28.9 | 58.7 | ||||
| Comprehensive income | $ 1,102.0 | $ 874.6 | $ 899.0 | ||||
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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of gain (loss) from excluded component of derivative hedge, recognized in earnings. Excludes recognition under systematic and rational method. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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- References No definition available.
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| X | ||||||||||
- Definition Amount, after tax and adjustment, of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, after tax and before reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount after tax of other comprehensive income (loss) attributable to parent entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount, after tax and before adjustment, of unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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