Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ (13)us-gaap_ProfitLoss	$ 1,466us-gaap_ProfitLoss	$ 492us-gaap_ProfitLoss
Other comprehensive income:
Foreign currency translation adjustment	(108)	93	29
Income tax effect	2	(2)	(19)
Foreign currency translation adjustment, net of income tax effect	(106)	91	10
Pension and other postretirement benefit plans	(357)	385	(164)
Income tax effect	142	(154)	63
Pension and other post-retirement benefit plans, net of income tax effect	(215)	231	(101)
Unrealized gain (loss) on investment and forward exchange contract	4	2	(4)
Income tax effect	(1)	(2)	2
Unrealized loss on investments and forward exchange contracts, net of income tax effect	3	0	(2)
Comprehensive income	(331)	1,788	399
Less: comprehensive income attributable to nonredeemable noncontrolling interests	(10)	(18)	(20)
Less: comprehensive income attributable to redeemable noncontrolling interests	(92)	(73)	(34)
Comprehensive income attributable to McGraw Hill Financial, Inc.	$ (433)us-gaap_ComprehensiveIncomeNetOfTax	$ 1,697us-gaap_ComprehensiveIncomeNetOfTax	$ 345us-gaap_ComprehensiveIncomeNetOfTax

Comprehensive Income (Loss), Net of Tax, Portion Attributable to Nonredeemable Noncontrolling Interest

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Comprehensive Income (Loss), Net of Tax, Portion Attributable to Redeemable Noncontrolling Interest

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount before tax, after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount before tax, after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount before tax, after reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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