CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net income	$ 949.6	$ 1,006.0	$ 815.9
Foreign currency adjustments:
Foreign currency translation adjustment - Pre Tax	(110.5)	(123.0)	(9.5)
Foreign currency translation adjustment - Tax	(14.7)	(10.7)	(2.0)
Foreign currency translation adjustments - Net of Tax	(125.2)	(133.7)	(11.5)
Foreign currency translation adjustments - reclassification of losses included in net income - Pre Tax	$ (0.1)	4.4	1.4
Foreign currency translation adjustments - reclassification of losses included in net income - Tax
Foreign currency translation adjustments - reclassification of losses included in net income - Net of Tax	$ (0.1)	4.4	1.4
Cash flow hedges:
Net realized loss on cash flow hedges - Pre Tax	$ (1.1)
Net realized loss on cash flow hedges - Tax
Net realized loss on cash flow hedges - Net of Tax	$ (1.1)
Reclassification of losses included in net income - Pre Tax			1.2
Reclassification of losses included in net income - Tax			(0.5)
Reclassification of losses included in net income - Net of Tax			0.7
Available for sale securities:
Net unrealized gains on available for sale securities - Pre Tax	$ 3.3	1.0
Net unrealized gains on available for sale securities - Tax
Net unrealized gains on available for sale securities - Net of Tax	$ 3.3	1.0
Reclassification of gains included in net income - Pre Tax	$ (0.9)	(0.1)
Reclassification of gains included in net income - Tax
Reclassification of gains included in net income - Net of Tax	$ (0.9)	(0.1)
Pension and Other Retirement Benefits:
Amortization of actuarial losses and prior service costs included in net income - Pre Tax	13.5	7.3	11.9
Amortization of actuarial losses and prior service costs included in net income - Tax	(5.2)	(2.8)	(4.9)
Amortization of actuarial losses and prior service costs included in net income - Net of Tax	8.3	4.5	7.0
Net actuarial gain (loss) arising during period	18.5	(93.8)	50.9
Net actuarial losses and prior service costs - Tax	(7.1)	37.1	(21.0)
Net actuarial losses and prior service costs - Net of Tax	11.4	(56.7)	29.9
Total other comprehensive income (loss) - Pre Tax	(77.3)	(204.2)	55.9
Total other comprehensive income (loss) - Tax	(27.0)	23.6	(28.4)
Total other comprehensive income (loss) - Net of Tax	(104.3)	(180.6)	27.5
Comprehensive income (loss)	845.3	825.4	843.4
Less: comprehensive income attributable to noncontrolling interests and redeemable noncontrolling interest	8.3	17.3	11.4
Comprehensive income attributable to Moody's	$ 837.0	$ 808.1	$ 832.0