Consolidated Statement of Shareholders' Equity (Deficit) (USD $) In Millions	Total		Common Stock	Capital Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Total Moody's Shareholders' Equity (Deficit)	Non-Controlling Interests
Beginning Balance at Dec. 31, 2009	$ (596.1)		$ 3.4	$ 391.1	$ 3,329.0	$ (4,288.5)	$ (41.2)	$ (606.2)	$ 10.1
Beginning Balance (in shares) at Dec. 31, 2009			342.9			(106.0)
Net income	513.4				507.8			507.8	5.6
Dividends	(105.4)				(100.6)			(100.6)	(4.8)
Stock-based compensation	56.9			56.9				56.9
Shares issued for stock-based compensation plans, net	34.6			(70.2)		104.8		34.6
Shares issued for stock-based compensation plans, net (in shares)						2.5
Net excess tax benefit upon settlement of stock-based compensation awards	13.7			13.7				13.7
Treasury shares repurchased, shares						(8.6)
Treasury shares repurchased	(223.6)					(223.6)		(223.6)
Currency translation adjustment	11.8						11.5	11.5	0.3
Net actuarial losses and prior service cost	(7.3)	[1]					(7.3)	(7.3)
Amortization and recognition of prior service costs and actuarial losses	2.9	[2]					2.9	2.9
Net unrealized gain on cash flow hedges	0.7						0.7	0.7
Ending Balance at Dec. 31, 2010	(298.4)		3.4	391.5	3,736.2	(4,407.3)	(33.4)	(309.6)	11.2
Ending Balance (in shares) at Dec. 31, 2010			342.9			(112.1)
Net income	577.0				571.4			571.4	5.6
Dividends	(136.6)				(131.5)			(131.5)	(5.1)
Stock-based compensation	56.9			56.9				56.9
Shares issued for stock-based compensation plans, net	46.4			(59.2)		105.6		46.4
Shares issued for stock-based compensation plans, net (in shares)						2.6
Net excess tax benefit upon settlement of stock-based compensation awards	7.2			7.2				7.2
Excess of consideration paid over carrying value of additional investment in KIS Pricing	(1.9)			(1.9)				(1.9)
Purchase of KIS Pricing shares from noncontrolling interest	(1.0)								(1.0)
Treasury shares repurchased, shares						(11.0)
Treasury shares repurchased	(333.8)					(333.8)		(333.8)
Currency translation adjustment	(47.0)						(46.9)	(46.9)	(0.1)
Net actuarial losses and prior service cost	(34.2)	[1]					(34.2)	(34.2)
Amortization and recognition of prior service costs and actuarial losses	4.4	[2]					4.4	4.4
Net unrealized gain on cash flow hedges	2.6						2.6	2.6
Ending Balance at Dec. 31, 2011	(158.4)		3.4	394.5	4,176.1	(4,635.5)	(107.5)	(169.0)	10.6
Ending Balance (in shares) at Dec. 31, 2011			342.9			(120.5)
Net income	696.1				690.0			690.0	6.1
Dividends	(157.5)				(152.8)			(152.8)	(4.7)
Stock-based compensation	64.6			64.6				64.6
Shares issued for stock-based compensation plans, net	116.6			(100.9)		217.5		116.6
Shares issued for stock-based compensation plans, net (in shares)						5.6
Net excess tax benefit upon settlement of stock-based compensation awards	10.3			10.3				10.3
Adjustment to redemption value of redeemable noncontrolling interest	(3.4)			(3.4)				(3.4)
Treasury shares repurchased, shares						(4.8)
Treasury shares repurchased	(196.5)					(196.5)		(196.5)
Currency translation adjustment	33.6						34.2	34.2	(0.6)
Net actuarial losses and prior service cost	(14.8)	[1]					(14.8)	(14.8)
Amortization and recognition of prior service costs and actuarial losses	5.9	[2]					5.9	5.9
Net unrealized gain on cash flow hedges	0.1						0.1	0.1
Ending Balance at Dec. 31, 2012	$ 396.6		$ 3.4	$ 365.1	$ 4,713.3	$ (4,614.5)	$ (82.1)	$ 385.2	$ 11.4
Ending Balance (in shares) at Dec. 31, 2012			342.9			(119.7)

[1] Amounts are net of income taxes of $11.2 million, $22.1 million and $5.2 million for the years ended December 31, 2012, 2011 and 2010, respectively.

[2] Amounts are net of income taxes of $4.1 million, $3.0 million and $2.1 million for the years ended December 31, 2012, 2011 and 2010, respectively.