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v2.4.1.9

Restructuring (Details) (2014 Restructuring Plan, USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014 position
Restructuring Cost and Reserve [Line Items] |  |
Workforce reduction (in positions) |  | 590 us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated
Restructuring charges paid | $ 18 us-gaap_PaymentsForRestructuring |
S&P Ratings |  |
Restructuring Cost and Reserve [Line Items] |  |
Initial Charge Recorded | 45 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = mhfi_RestructuringPlanTwoZeroOneFourMember / us-gaap_StatementBusinessSegmentsAxis = mhfi_SpRatingsMember |
Ending Reserve Balance | 31 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = mhfi_RestructuringPlanTwoZeroOneFourMember / us-gaap_StatementBusinessSegmentsAxis = mhfi_SpRatingsMember |
S&P Capital IQ |  |
Restructuring Cost and Reserve [Line Items] |  |
Initial Charge Recorded | 9 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = mhfi_RestructuringPlanTwoZeroOneFourMember / us-gaap_StatementBusinessSegmentsAxis = mhfi_SpCapitalIqIndicesMember |
Ending Reserve Balance | 6 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = mhfi_RestructuringPlanTwoZeroOneFourMember / us-gaap_StatementBusinessSegmentsAxis = mhfi_SpCapitalIqIndicesMember |
C&C |  |
Restructuring Cost and Reserve [Line Items] |  |
Initial Charge Recorded | 16 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = mhfi_RestructuringPlanTwoZeroOneFourMember / us-gaap_StatementBusinessSegmentsAxis = mhfi_CommoditiesCommercialMember |
Ending Reserve Balance | 10 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = mhfi_RestructuringPlanTwoZeroOneFourMember / us-gaap_StatementBusinessSegmentsAxis = mhfi_CommoditiesCommercialMember |
C&C | McGraw Hill Construction [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Initial Charge Recorded | 3 us-gaap_RestructuringCharges / dei_LegalEntityAxis = mhfi_McGrawHillConstructionMember / us-gaap_RestructuringPlanAxis = mhfi_RestructuringPlanTwoZeroOneFourMember / us-gaap_StatementBusinessSegmentsAxis = mhfi_CommoditiesCommercialMember |
Ending Reserve Balance | 1 us-gaap_RestructuringReserve / dei_LegalEntityAxis = mhfi_McGrawHillConstructionMember / us-gaap_RestructuringPlanAxis = mhfi_RestructuringPlanTwoZeroOneFourMember / us-gaap_StatementBusinessSegmentsAxis = mhfi_CommoditiesCommercialMember |
Corporate |  |
Restructuring Cost and Reserve [Line Items] |  |
Initial Charge Recorded | 16 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = mhfi_RestructuringPlanTwoZeroOneFourMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |
Ending Reserve Balance | 13 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = mhfi_RestructuringPlanTwoZeroOneFourMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |
Total |  |
Restructuring Cost and Reserve [Line Items] |  |
Initial Charge Recorded | 86 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = mhfi_RestructuringPlanTwoZeroOneFourMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_OperatingSegmentsMember |
Ending Reserve Balance | $ 60 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = mhfi_RestructuringPlanTwoZeroOneFourMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_OperatingSegmentsMember | 78 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = mhfi_RestructuringPlanTwoZeroOneFourMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_OperatingSegmentsMember

X
- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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Balance Type: | credit
Period Type: | duration

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- Definition The number of positions eliminated during the period as a result of restructuring activities. + References No definition available. + Details
Name: | us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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X
- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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