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Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2023

Fair Value [Abstract]

Carrying Values and Fair Values of Debt Instruments

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​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	Carrying Value at					​	Fair Value (a) at
​	​	June 30,		​	December 31,		​	June 30,		​	December 31,
​		2023			2022			2023			2022
4.25% Senior Notes due 2028	​	$	500,000	​	$	500,000	​	$	480,900	​	$	470,850
3.50% Senior Notes due 2029	​	$	500,000	​	$	500,000	​	$	460,200	​	$	457,650
2.60% Senior Notes due 2030	​	$	600,000	​	$	600,000	​	$	516,360	​	$	510,540
2.20% Senior Notes due 2032	​	$	650,000	​	$	650,000	​	$	521,560	​	$	514,540
3.20% Senior Notes due 2032	​	$	500,000	​	$	500,000	​	$	435,300	​	$	429,000
4.20% Senior Notes due 2033	​	$	750,000	​	$	750,000	​	$	704,550	​	$	699,450
3.05% Senior Notes due 2050	​	$	500,000	​	$	500,000	​	$	339,450	​	$	343,300
2.95% Senior Notes due 2052	​	$	850,000	​	$	850,000	​	$	580,975	​	$	561,425

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*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://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-11

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- References

No definition available.

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