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Note 11 - Long-Term Incentive Compensation - Award Activity (Details) shares in Millions | 3 Months Ended
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Mar. 31, 2025 shares
Awards granted (in shares) | 139.4
Restricted Stock [Member] |
Awards granted (in shares) | 72.5
Mutual Fund Awards [Member] |
Awards granted (in shares) | 66.9

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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Details
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Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |