CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net income	$ 264.1	$ 324.4	$ 495.4	$ 546.1
Foreign currency translation:
Foreign currency translation adjustments - Pre Tax	39.8	14.1	(69.6)	9.3
Foreign currency translation adjustment - Tax Amount	0.0	0.0	0.0	0.0
Foreign currency translation adjustments - Net of Tax	39.8	14.1	(69.6)	9.3
Foreign currency translation adjustments - reclassification of losses included in net income - Pre Tax	0.0	4.4	(0.1)	4.4
Foreign currency translation adjustments - reclassification of losses included in net income - Tax Effect	0.0	0.0	0.0	0.0
Foreign currency translation adjustments - reclassification of losses included in net income - Net of Tax	0.0	4.4	(0.1)	4.4
Net investment hedges:
Net realized and unrealized gain (loss) on cash flow and net investment hedges - Pre Tax	(13.1)	(2.7)	18.5	(6.3)
Net realized and unrealized gain (loss) on cash flow and net investment hedges - Tax Amount	5.4	1.1	(7.3)	2.6
Net realized and unrealized gain (loss) on cash flow and net investment hedges - Net of Tax	(7.7)	(1.6)	11.2	(3.7)
Reclassification of losses included in net income - Pre Tax	0.0	0.0	0.0	0.0
Reclassification of losses included in net income - Tax Amount	0.0	0.0	0.0	0.0
Reclassification of losses included in net income- Net of Tax	0.0	0.0	0.0	0.0
Available for sale securities:
Net unrealized gains on available for sale securities - Pre Tax	1.0	0.0	2.1	0.0
Net unrealized gains on available for sale securities - Tax	0.0	0.0	0.0	0.0
Net unrealized gains on available for sale securities - Net Of Tax	1.0	0.0	2.1	0.0
Reclassification of gains included in net income - Pre Tax	(0.2)	0.0	(0.2)	0.0
Reclassification of gains included in net income - Tax	0.0	0.0	0.0	0.0
Reclassification of gains included in net income - Net Of Tax	(0.2)	0.0	(0.2)	0.0
Pension and Other Retirement Benefits:
Amortization of actuarial losses and prior service costs included in net income - Pre Tax	3.1	2.0	6.9	3.7
Amortization of actuarial losses and prior service costs included in net income - tax	(1.1)	(0.8)	(2.6)	(2.3)
Amortization of actuarial losses and prior service costs included in net income - Net of Tax	2.0	1.2	4.3	1.4
Net actuarial losses and prior service costs - Pre Tax	10.9	(6.9)	10.9	(6.9)
Net actuarial losses and prior service costs - Tax	(4.2)	2.8	(4.2)	2.8
Net actuarial losses and prior service costs - Net of Tax	6.7	(4.1)	6.7	(4.1)
Total other comprehensive income (loss) - Pre Tax	41.5	10.9	(31.5)	4.2
Net current period other comprehensive income/(loss)	0.1	3.1	(14.1)	3.1
Total other comprehensive income (loss) - Net of Tax	41.6	14.0	(45.6)	7.3
Comprehensive income	305.7	338.4	449.8	553.4
Comprehensive income attributable to noncontrolling interests and redeemable noncontrolling interest	2.4	5.2	3.6	8.9
Comprehensive income attributable to Moody's	$ 303.3	$ 333.2	$ 446.2	$ 544.5