XML 156 R44.htm IDEA: XBRL DOCUMENT
v3.24.2

Revenues - Transaction and Relationship Revenue (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 1,817 | $ 1,494 | $ 3,603 | $ 2,964
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
Transaction Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 731 | $ 490 | $ 1,450 | $ 967
Percentage of revenues | 40.00% | 33.00% | 40.00% | 33.00%
Recurring Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 1,086 | $ 1,004 | $ 2,153 | $ 1,997
Percentage of revenues | 60.00% | 67.00% | 60.00% | 67.00%
MA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 802 | $ 747 | $ 1,601 | $ 1,484
MA | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 806 | $ 751 | $ 1,608 | $ 1,491
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MA | Decision Solutions (DS) |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 366 | $ 334 |  |
MA | Decision Solutions (DS) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 366 | $ 334 | $ 731 | $ 668
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MA | Research and Insights (R&I) |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 226 | $ 217 |  |
MA | Research and Insights (R&I) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 226 | $ 217 | $ 448 | $ 432
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MA | Data and Information (D&I) |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 210 | $ 196 |  |
MA | Data and Information (D&I) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 210 | $ 196 | $ 422 | $ 384
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MA | Transaction Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 39 | $ 47 | $ 81 | $ 92
MA | Transaction Revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of revenues | 5.00% | 6.00% | 5.00% | 6.00%
MA | Transaction Revenue | Decision Solutions (DS) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 35 | $ 43 | $ 72 | $ 83
Percentage of revenues | 10.00% | 13.00% | 10.00% | 12.00%
MA | Transaction Revenue | Research and Insights (R&I) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 3 | $ 3 | $ 7 | $ 8
Percentage of revenues | 1.00% | 1.00% | 2.00% | 2.00%
MA | Transaction Revenue | Data and Information (D&I) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 1 | $ 1 | $ 2 | $ 1
Percentage of revenues | 0.00% | 1.00% | 0.00% | 0.00%
MA | Recurring Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 763 | $ 700 | $ 1,520 | $ 1,392
MA | Recurring Revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of revenues | 95.00% | 94.00% | 95.00% | 94.00%
MA | Recurring Revenue | Decision Solutions (DS) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 331 | $ 291 | $ 659 | $ 585
Percentage of revenues | 90.00% | 87.00% | 90.00% | 88.00%
MA | Recurring Revenue | Research and Insights (R&I) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 223 | $ 214 | $ 441 | $ 424
Percentage of revenues | 99.00% | 99.00% | 98.00% | 98.00%
MA | Recurring Revenue | Data and Information (D&I) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 209 | $ 195 | $ 420 | $ 383
Percentage of revenues | 100.00% | 99.00% | 100.00% | 100.00%
MIS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 1,015 | $ 747 | $ 2,002 | $ 1,480
MIS | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 1,064 | $ 793 | $ 2,098 | $ 1,571
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MIS | Corporate Finance (CFG) |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 525 | $ 365 |  |
MIS | Corporate Finance (CFG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 525 | $ 365 | $ 1,054 | $ 721
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MIS | Structured Finance (SFG) |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 131 | $ 102 |  |
MIS | Structured Finance (SFG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 131 | $ 102 | $ 245 | $ 201
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MIS | Financial Institutions (FIG) |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 195 | $ 145 |  |
MIS | Financial Institutions (FIG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 195 | $ 145 | $ 390 | $ 287
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MIS | Public, Project and Infrastructure Finance (PPIF) |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 154 | $ 127 |  |
MIS | Public, Project and Infrastructure Finance (PPIF) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 154 | $ 127 | $ 295 | $ 256
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MIS | MIS Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 10 | $ 8 |  |
MIS | MIS Other | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 10 | $ 8 | $ 18 | $ 15
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MIS | Transaction Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 692 | $ 443 | $ 1,369 | $ 875
MIS | Transaction Revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of revenues | 68.00% | 59.00% | 68.00% | 59.00%
MIS | Transaction Revenue | Corporate Finance (CFG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 388 | $ 236 | $ 787 | $ 466
Percentage of revenues | 74.00% | 65.00% | 75.00% | 65.00%
MIS | Transaction Revenue | Structured Finance (SFG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 76 | $ 48 | $ 135 | $ 94
Percentage of revenues | 58.00% | 47.00% | 55.00% | 47.00%
MIS | Transaction Revenue | Financial Institutions (FIG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 115 | $ 73 | $ 237 | $ 143
Percentage of revenues | 59.00% | 50.00% | 61.00% | 50.00%
MIS | Transaction Revenue | Public, Project and Infrastructure Finance (PPIF) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 110 | $ 84 | $ 206 | $ 169
Percentage of revenues | 71.00% | 66.00% | 70.00% | 66.00%
MIS | Transaction Revenue | MIS Other | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 3 | $ 2 | $ 4 | $ 3
Percentage of revenues | 30.00% | 25.00% | 22.00% | 20.00%
MIS | Recurring Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 323 | $ 304 | $ 633 | $ 605
MIS | Recurring Revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of revenues | 32.00% | 41.00% | 32.00% | 41.00%
MIS | Recurring Revenue | Corporate Finance (CFG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 137 | $ 129 | $ 267 | $ 255
Percentage of revenues | 26.00% | 35.00% | 25.00% | 35.00%
MIS | Recurring Revenue | Structured Finance (SFG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 55 | $ 54 | $ 110 | $ 107
Percentage of revenues | 42.00% | 53.00% | 45.00% | 53.00%
MIS | Recurring Revenue | Financial Institutions (FIG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 80 | $ 72 | $ 153 | $ 144
Percentage of revenues | 41.00% | 50.00% | 39.00% | 50.00%
MIS | Recurring Revenue | Public, Project and Infrastructure Finance (PPIF) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 44 | $ 43 | $ 89 | $ 87
Percentage of revenues | 29.00% | 34.00% | 30.00% | 34.00%
MIS | Recurring Revenue | MIS Other | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 7 | $ 6 | $ 14 | $ 12
Percentage of revenues | 70.00% | 75.00% | 78.00% | 80.00%

X
- Definition Represents the percentage of revenue that is classified as either transaction revenue or relationship revenue. + References No definition available. + Details
Name: | mco_PercentageOfRevenues
Namespace Prefix: | mco_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 + Details
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-41 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (ee) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 4: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 5: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 924 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479941/924-10-S99-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 30 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-42 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-40 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-4 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_ProductOrServiceAxis=mco_TransactionRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mco_RecurringRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mco_MoodysAnalyticsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsegmentsAxis=mco_DecisionSolutionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsegmentsAxis=mco_ResearchAndInsightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsegmentsAxis=mco_DataAndInformationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mco_MoodysInvestorsServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsegmentsAxis=mco_CorporateFinanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsegmentsAxis=mco_StructuredFinanceLineOfBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsegmentsAxis=mco_FinancialInstitutionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsegmentsAxis=mco_PublicProjectAndInfrastructureFinanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsegmentsAxis=mco_MISOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |