Acquisitions and Other Transactions (Unaudited Pro Forma Financial Results) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue		$ 4,083.8		$ 12,399.7
Business Acquisition, Pro Forma Net Income (Loss)	$ 338.3	$ 313.7	$ 852.9	$ 915.1
Basic (in usd per share)	$ 0.28	$ 0.26	$ 0.71	$ 0.76
Diluted (in usd per share)	$ 0.28	$ 0.26	$ 0.71	$ 0.75
Basic (in shares)	1,199,500	1,212,500	1,200,400	1,211,800
Diluted (in shares)	1,207,600	1,218,100	1,205,600	1,216,100
Basic				1,211,800

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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The weighted average number of shares or units and dilutive common stock or unit equivalents outstanding in the calculation of proforma diluted earnings per share (earnings per unit), which is commonly presented in initial public offerings based on the terms of the offering.

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