Acquisitions and Divestitures (Divestitures) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Components of income from discontinued operations
Revenue									$ 139	$ 441	$ 2,242
Expenses									110	436	2,426
Operating income (loss)									29	5	(184)
Interest expense (income), net									0	2	(2)
Income (loss) before taxes on income (loss)									29	3	(182)
Provision for taxes on income (loss)									11	0	27
Income (loss) from discontinued operations, net of tax									18	3	(209)
Pre-tax gain on sale from discontinued operations									289	888	0
Provision for taxes on gain on sale									129	299	0
Gain on sale of discontinued operations, net of tax									160	589	0
Discontinued operations, net	163	2	6	7	6	(13)	11	587	178	592	(209)
Less: net (loss) income attributable to noncontrolling interests									0	(1)	5
Income (loss) from discontinued operations attributable to McGraw Hill Financial, Inc. common shareholders	163	2	6	7	6	(13)	11	588	178	593	(214)
Components of assets and liabilities held for sale
Accounts receivable, net					30					30
Goodwill					3					3
Other assets					3					3
Assets held for sale					36					36
Accounts payable and accrued expenses					13					13
Unearned revenue					41					41
Liabilities held for sale	$ 0				$ 54				$ 0	$ 54