CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income	$ 256.6	$ 233.8	$ 701.3	$ 729.2
Foreign currency translation:
Foreign currency translation adjustments - Pre Tax	(12.0)	(43.2)	(9.4)	(94.3)
Foreign currency translation adjustment - Tax	2.6	1.5	16.6	(5.8)
Foreign currency translation adjustments - Net of Tax	(9.4)	(41.7)	7.2	(100.1)
Foreign currency translation adjustments - reclassification of losses included in net income - Pre Tax				(0.1)
Foreign currency translation adjustments - reclassification of losses included in net income - Net of Tax				(0.1)
Cash flow hedges:
Net realized and unrealized gain (loss) on cash flow hedges - Pre Tax	5.1		2.5
Net realized and unrealized gain (loss) on cash flow hedges - Tax Amount	(1.9)		(1.0)
Net realized and unrealized gain (loss) on cash flow hedges - Net of Tax	3.2		1.5
Reclassification of losses (gains) included in net income - Pre Tax	(1.3)		(0.9)
Reclassification of losses included in net income - Tax Amount	0.4		0.3
Reclassification of losses included in net income- Net of Tax	(0.9)		(0.6)
Available for sale securities:
Net unrealized gains on available for sale securities - Pre Tax	0.7	0.7	1.9	2.8
Net unrealized gains on available for sale securities - Net of Tax	0.7	0.7	1.9	2.8
Reclassification of gains included in net income - Pre Tax		(0.6)		(0.8)
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	2.4	3.4	7.3	10.3
Amortization of actuarial losses and prior service costs included in net income - Tax	(0.9)	(1.3)	(2.8)	(3.9)
Amortization of actuarial losses and prior service costs included in net income - Net of Tax	1.5	2.1	4.5	6.4
Net actuarial losses and prior service costs - Pre Tax			5.3	10.9
Net actuarial losses and prior service costs - Tax			(2.0)	(4.2)
Net actuarial losses and prior service costs - Net of Tax			3.3	6.7
Total other comprehensive income (loss) - Pre Tax	(5.1)	(39.7)	6.7	(71.2)
Total other comprehensive income (loss) - Tax	0.2	0.2	11.1	(13.9)
Total other comprehensive income (loss) - Net of Tax	(4.9)	(39.5)	17.8	(85.1)
Comprehensive income	251.7	194.3	719.1	644.1
Less: Comprehensive income attributable to noncontrolling interests and redeemable noncontrolling interest	(14.8)	2.2	(10.0)	5.8
Comprehensive income attributable to Moody's	$ 266.5	$ 192.1	$ 729.1	$ 638.3