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Shareholders' Equity (Summary of Share Repurchases) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Nov. 06, 2025	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2024
Equity, Class of Treasury Stock [Line Items]
Total number of shares purchased (in millions)		700	1,400	900
Average price per share		$ 206.13	$ 208.61	$ 213.85
Total purchase price (in millions)		$ 154.1	$ 284.8	$ 200.0
Subsequent Event [Member]
Equity, Class of Treasury Stock [Line Items]
Total number of shares purchased (in millions)	200
Average price per share	$ 191.21
Total purchase price (in millions)	$ 40.2

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Total cost of shares repurchased divided by the total number of shares repurchased.

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-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
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Number of shares that have been repurchased during the period and are being held in treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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