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Business Acquisitions and Disposition (Details) - USD ($) $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Mar. 17, 2021 | Mar. 31, 2022 | Dec. 31, 2021
Business Acquisition [Line Items] |  |  |
Goodwill |  | $ 14,094.9 | $ 14,094.5
Sedaru, Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Sale of investment | $ 27.1 |  |
Pretax gain on sale of investment | $ 27.1 |  |
Other acquisitions |  |  |
Business Acquisition [Line Items] |  |  |
Aggregate purchase price |  | 49.8 |
Goodwill |  | 25.6 |
Other identifiable intangibles |  | 23.3 |
Other acquisitions | Customer related intangibles |  |  |
Business Acquisition [Line Items] |  |  |
Other identifiable intangibles |  | $ 20.9 |
Weighted average useful life of finite-lived intangible assets (in years) |  | 15 years 1 month 6 days |
Other acquisitions | Technology |  |  |
Business Acquisition [Line Items] |  |  |
Other identifiable intangibles |  | $ 2.4 |
Weighted average useful life of finite-lived intangible assets (in years) |  | 5 years 3 months 18 days |

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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477 + Details
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- Definition The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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