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Note 11- Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Millions					1 Months Ended		3 Months Ended		9 Months Ended
	Jul. 26, 2023	Apr. 25, 2023	Mar. 07, 2023	Feb. 14, 2023	Feb. 28, 2023	Dec. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2023	Nov. 08, 2022
Common Stock, Shares Authorized (in shares)						2,000,000,000	2,000,000,000		2,000,000,000
Share Price (in dollars per share)						$ 176.42	$ 236.24		$ 236.24
Preferred Stock, Shares Authorized (in shares)						80,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)						$ 0.001
Preferred Stock, Shares Issued (in shares)						0	0		0
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.34	$ 0.34		$ 0.34
Payments of Dividends							$ 49.2	$ 48.6	$ 147.9	$ 147.2
Treasury Stock, Shares, Acquired (in shares)							208,422	1,603,586	11,111,210	6,217,296
Treasury Stock, Value, Acquired, Cost Method							$ 49.8	$ 300.0	$ 2,551.1	$ 1,196.3
Treasury Stock, Common, Shares (in shares)						389,301,902	399,037,784		399,037,784
Common Stock Reissued (in shares)									1,375,328
Shares Issued, Price Per Share (in dollars per share)							$ 19.39		$ 19.39
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)							89,792	1,321,733	716,783	1,365,720
Accelerated Share Repurcahse ("ASR") Agreement [Member]
Stock Repurchase Program, Authorized Amount						$ 250.0					$ 2,500.0
Treasury Stock, Shares, Acquired (in shares)			10,655,301			1,168,224
Share Repurchase Programs [Member]
Treasury Stock, Shares, Acquired (in shares)						247,487	208,422		11,111,210
Shares Acquired, Average Cost Per Share (in dollars per share)					$ 176.68		$ 239.20		$ 189.59
Treasury Stock, Value, Acquired, Cost Method									$ 2,106.6
Stock Repurchase Program, Remaining Authorized Repurchase Amount							$ 891.5		891.5
Additonal Repurchase Authorization Shares Upon Sale of Energy Business [Member]
Stock Repurchase Program, Authorized Amount												$ 3,000.0
Sales and Excise Tax Payable							$ 18.3		$ 18.3

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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