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Stockholders' equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Stockholders' Equity Note [Abstract]
Dividends declared on common stock	$ 227,191	$ 227,400	$ 222,100	$ 214,450	$ 676,733	$ 638,351
Dividends declared on common stock (per share)	$ 1.30	$ 1.30	$ 1.27	$ 1.24	$ 3.87	$ 3.69
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	$ 5,181			$ (8,395)	$ (6,633)	$ (4,172)
Shares of common stock authorized	400,000,000.0				400,000,000.0
Shares of common stock issued and outstanding	172,200,000				172,200,000
Shares of preferred stock authorized	100,000,000.0				100,000,000.0
Shares of preferred stock issued and outstanding	0				0
Number of "excess stock" authorized (in shares)	200,000,000.0				200,000,000.0
Number of excess stock authorized issued and outstanding (in shares)	0				0

X

- Definition

Represents the maximum number of an additional series of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter.

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Represents the number of an additional series of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued and outstanding.

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Aggregate dividends declared during the period for each share of common stock outstanding.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Number of shares issued for nonredeemable preferred shares and preferred shares redeemable solely at option of issuer. Includes, but is not limited to, preferred shares issued, repurchased, and held as treasury shares. Excludes preferred shares classified as debt.

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