CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Net income	$ 186.5		$ 132.1		$ 537.7		$ 479.9
Foreign currency translation adjustments	32.8		(74.4)		23.5		(38.2)
Cash flow and net investment hedges, net of tax:
Net unrealized losses on cash flow and net investment hedges	0.1	[1]	(0.1)	[1]	(1.5)	[1]	(0.5)	[1]
Reclassification of losses included in net income	0.6	[2]	0.8	[2]	1.9	[2]	2.3	[2]
Cash flow and net investment hedges, net of tax	0.7		0.7		0.4		1.8
Pension and Other Post-Retirement Benefits, net of tax:
Amortization of actuarial losses and prior service costs included in net income	1.5	[3]	0.6	[3]	4.5	[3]	2.3	[3]
Net actuarial losses and prior service costs					(5.6)	[4]	(3.3)	[4]
Pension and Other Post-Retirement Benefits, net of tax	1.5		0.6		(1.1)		(1.0)
Comprehensive income	221.5		59.0		560.5		442.5
Less: comprehensive income attributable to noncontrolling interests	2.5		0.3		8.8		4.4
Comprehensive income attributable to Moody's	$ 219.0		$ 58.7		$ 551.7		$ 438.1

[1] Amounts are net of income taxes of $0.1 million for both the three months ended September 30, 2012 and 2011 and $1.0 million and $0.2 million for the nine months ended September 30, 2012 and 2011 respectively.

[2] Amounts are net of income taxes of $0.4 million and $0.6 million for the three months ended September 30, 2012 and 2011, respectively, and $1.3 million and $1.6 million for the nine months ended September 30, 2012 and 2011 respectively.

[3] Amounts are net of income taxes of $1.1 million and $0.5 million for the three months ended September 30, 2012 and 2011, respectively, and $3.1 million and $1.7 million for the nine months ended September 30, 2012 and 2011 respectively.

[4] Amounts are net of income taxes of $3.9 million and $2.4 million for the nine months ended September 30, 2012 and 2011 respectively.