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Acquisitions and dispositions	6 Months Ended
Acquisitions and dispositions	Jun. 30, 2022
Business Combination and Asset Acquisition [Abstract]
Acquisitions and dispositions	Acquisitions and dispositions We sometimes structure our acquisitions with both an initial payment and later contingent payments tied to post-closing revenue or income growth. There were no contingent payments in the first six months of 2022. At June 30, 2022, we are potentially obligated to pay additional consideration which, using reasonable assumptions and estimates, could range from $15 million to $45 million over the next three years. Goodwill and intangible assets related to acquisitions completed in 2021 totaled $99 million and $70 million, respectively. See Note 3 of the Notes to Consolidated Financial Statements in our 2021 Annual Report for information related to the 2021 acquisitions.