Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2011

Earnings Per Share [Abstract]

Reconciliation of the number of shares used for calculating basic and diluted earnings per common share

	Three Months					Nine Months
	2011			2010		2011			2010
Amounts attributable to The McGraw-Hill Companies, Inc. common shareholders:
Income from continuing operations	$	366.7		$	379.2	$	698.3		$	673.3
Loss from discontinued operations, net of tax		(1.1	)		0.7		(1.7	)		0.9
Net income attributable to the Company	$	365.6		$	379.9	$	696.6		$	674.2
Basic weighted-average number of common shares outstanding		297.8			307.2		302.2			310.6
Effect of stock options and other dilutive securities		5.8			2.1		5.2			2.3
Diluted weighted-average number of common shares outstanding		303.6			309.3		307.4			312.9
Basic EPS:
Income from continuing operations	$	1.23		$	1.23	$	2.31		$	2.17
Loss from discontinued operations, net of tax		—			0.01	$	—			—
Net income	$	1.23		$	1.24	$	2.31		$	2.17
Diluted EPS:
Income from continuing operations	$	1.21		$	1.23	$	2.27		$	2.15
Loss from discontinued operations, net of tax		—			—		—			—
Net income	$	1.21		$	1.23	$	2.27		$	2.15