CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net income	$ 233.8	$ 218.5	$ 729.2	$ 764.6
Foreign currency translation:
Foreign currency translation adjustments - Pre Tax	(43.2)	(79.2)	(94.3)	(76.2)
Foreign currency translation adjustment - Tax Amount	1.5	(8.2)	(5.8)	(5.6)
Foreign currency translation adjustments - Net of Tax	$ (41.7)	$ (87.4)	(100.1)	(81.8)
Foreign currency translation adjustments - reclassification of losses included in net income - Pre Tax			$ (0.1)	$ 4.4
Foreign currency translation adjustments - reclassification of losses included in net income - Tax Effect
Foreign currency translation adjustments - reclassification of losses included in net income - Net of Tax			$ (0.1)	$ 4.4
Available for sale securities:
Net unrealized gains on available for sale securities - Pre Tax	$ 0.7		$ 2.8
Net unrealized gains on available for sale securities - Tax
Net unrealized gains on available for sale securities - Net of Tax	$ 0.7		$ 2.8
Reclassification of gains included in net income - Pre Tax	$ (0.6)		$ (0.8)
Reclassification of gains included in net income - Tax
Reclassification of gains included in net income - Net of Tax	$ (0.6)		$ (0.8)
Pension and Other Retirement Benefits:
Amortization of actuarial losses and prior service costs included in net income - Pre Tax	3.4	$ 1.8	10.3	$ 5.5
Amortization of actuarial losses and prior service costs included in net income - Tax	(1.3)	(0.7)	(3.9)	(3.0)
Amortization of actuarial losses and prior service costs included in net income - Net of Tax	$ 2.1	$ 1.1	6.4	2.5
Net actuarial losses and prior service costs - Pre Tax			10.9	(6.9)
Net actuarial losses and prior service costs - Tax			(4.2)	2.8
Net actuarial losses and prior service costs - Net of Tax			6.7	(4.1)
Total other comprehensive income (loss) - Pre Tax	$ (39.7)	$ (77.4)	(71.2)	(73.2)
Total other comprehensive income (loss) - Tax	0.2	(8.9)	(13.9)	(5.8)
Total other comprehensive income (loss) - Net of Tax	(39.5)	(86.3)	(85.1)	(79.0)
Comprehensive income	194.3	132.2	644.1	685.6
Less: Comprehensive income attributable to noncontrolling interests and redeemable noncontrolling interest	2.2	3.3	5.8	12.2
Comprehensive income attributable to Moody's	$ 192.1	$ 128.9	$ 638.3	$ 673.4