Percentage of voting equity interests acquired at the acquisition date in the business combination.

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-Name Accounting Standards Codification
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- Definition

Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 55
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-URI https://asc.fasb.org/extlink&oid=122137925&loc=d3e14258-109268

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Interest income derived from funds deposited with both domestic and foreign financial institutions including funds in money market and other accounts.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
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-Publisher SEC
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- Definition

The number of businesses acquired by the entity during the period.

+ References

No definition available.

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Acquisitions Narrative (Details) $ in Millions	12 Months Ended
Acquisitions Narrative (Details) $ in Millions	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Oct. 03, 2022
Number of businesses acquired	1	0	4
Goodwill and intangible assets related to acquisitions			$ 28.0
Current year acquisitions/(dispositions)	$ 203.0	$ (0.2)
Business Acquisition, Percentage of Voting Interests Acquired				83.90%
Interest income	63.4	29.7	$ 29.5
IAN
Current year acquisitions/(dispositions)	0.0	(0.2)
DXTRA
Current year acquisitions/(dispositions)	0.0	0.0
MD&E
Current year acquisitions/(dispositions)	209.5	0.0
IA&C
Number of businesses acquired			3
Current year acquisitions/(dispositions)	(6.5)	0.0
SC&E
Number of businesses acquired			1
Current year acquisitions/(dispositions)	$ 0.0	$ 0.0