Consolidated Statements of Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Statement [Abstract]
Revenue	$ 1,250	$ 1,072	$ 2,431	$ 2,108
Expenses:
Operating-related expenses	397	351	771	713
Selling and general expenses	382	379	876	740
Depreciation	22	23	45	45
Amortization of intangibles	13	11	25	20
Total expenses	814	764	1,717	1,518
Operating profit	436	308	714	590
Interest expense, net	16	21	31	42
Income from continuing operations before taxes on income	420	287	683	548
Provision for taxes on income	147	107	236	205
Income from continuing operations	273	180	447	343
Loss from discontinued operations, net of tax	4	40	(27)	4
Gain on sale of discontinued operations, net of tax	0	0	612	0
Discontinued operations, net	4	40	585	4
Net income	277	220	1,032	347
Less: net income from continuing operations attributable to noncontrolling interests	(23)	(3)	(44)	(8)
Less: net (income) loss from discontinued operations attributable to noncontrolling interests	0	(1)	1	0
Net income	254	216	989	339
Amounts attributable to The McGraw-Hill Companies, Inc. common shareholders:
Income from continuing operations	250	177	403	335
Income from discontinued operations	4	39	586	4
Net income	$ 254	$ 216	$ 989	$ 339
Basic:
Income from continuing operations (in usd per share)	$ 0.91	$ 0.63	$ 1.45	$ 1.20
Income (loss) from discontinued operations (in usd per share)	$ 0.01	$ 0.14	$ 2.11	$ 0.02
Net income (in usd per share)	$ 0.93	$ 0.77	$ 3.57	$ 1.22
Diluted:
Income from continuing operations (in usd per share)	$ 0.90	$ 0.62	$ 1.43	$ 1.18
Income (loss) from discontinued operations (in usd per share)	$ 0.01	$ 0.14	$ 2.08	$ 0
Net income (in usd per share)	$ 0.91	$ 0.76	$ 3.52	$ 1.19
Average number of common shares outstanding:
Basic (in shares)	274.3	279.7	277.4	278.9
Diluted (in shares)	278.3	285.3	281.3	284.5
Dividend declared per common share (in usd per share)	$ 0.28	$ 0.255	$ 0.56	$ 0.51