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Fair Value of Financial Instruments (Tables) | 9 Months Ended
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Sep. 30, 2025
Fair Value Disclosures [Abstract] |
Carrying Values and Fair Values of Debt Instruments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Carrying Value at | ​ | Fair Value (a) at
​ | ​ | September 30, | ​ | December 31, | ​ | September 30, | ​ | December 31,
​ |  | 2025 |  | 2024 |  | 2025 |  | 2024
4.25% Senior Notes due 2028 | ​ | $ | 500,000 | ​ | $ | 500,000 | ​ | $ | 503,500 | ​ | $ | 488,500
3.50% Senior Notes due 2029 | ​ | $ | 500,000 | ​ | $ | 500,000 | ​ | $ | 491,300 | ​ | $ | 471,450
4.50% Senior Notes due 2029 | ​ | $ | 359,150 | ​ | $ | 347,500 | ​ | $ | 374,510 | ​ | $ | 359,168
2.60% Senior Notes due 2030 | ​ | $ | 600,000 | ​ | $ | 600,000 | ​ | $ | 563,220 | ​ | $ | 536,220
2.20% Senior Notes due 2032 | ​ | $ | 650,000 | ​ | $ | 650,000 | ​ | $ | 571,935 | ​ | $ | 535,275
3.20% Senior Notes due 2032 | ​ | $ | 500,000 | ​ | $ | 500,000 | ​ | $ | 462,700 | ​ | $ | 437,150
4.20% Senior Notes due 2033 | ​ | $ | 750,000 | ​ | $ | 750,000 | ​ | $ | 735,750 | ​ | $ | 696,300
5.00% Senior Notes due 2034 | ​ | $ | 750,000 | ​ | $ | 750,000 | ​ | $ | 765,525 | ​ | $ | 731,625
5.25% Senior Notes due 2035 | ​ | $ | 500,000 | ​ | $ | — | ​ | $ | 516,050 | ​ | $ | —
3.05% Senior Notes due 2050 | ​ | $ | 500,000 | ​ | $ | 500,000 | ​ | $ | 338,650 | ​ | $ | 321,700
2.95% Senior Notes due 2052 | ​ | $ | 850,000 | ​ | $ | 850,000 | ​ | $ | 556,325 | ​ | $ | 528,955
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| (a) | Senior Notes are classified as Level 2 within the fair value hierarchy. Fair value inputs include third-party calculations of the market interest rate of notes with similar ratings in similar industries over the remaining note terms.

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 10 -SubTopic 10 -Topic 825 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-10 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-13 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-12 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-12 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 + Details
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