CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net income	$ 313.6	$ 258.1	$ 659.5	$ 444.7
Foreign currency translation:
Foreign currency translation adjustments - Pre Tax	35.1	(45.9)	49.5	2.6
Foreign currency translation adjustment - Tax	15.4	26.5	13.1	14.0
Foreign currency translation adjustments - Net of Tax	50.5	(19.4)	62.6	16.6
Cash flow hedges:
Net realized and unrealized gain (loss) on cash flow hedges - Pre Tax	5.1	(4.6)	4.8	(2.6)
Net realized and unrealized gain (loss) on cash flow hedges - Tax Amount	(1.9)	1.7	(1.8)	0.9
Net realized and unrealized gain (loss) on cash flow hedges - Net of Tax	3.2	(2.9)	3.0	(1.7)
Reclassification of losses (gains) included in net income - Pre Tax	(6.1)	2.6	(7.5)	0.4
Reclassification of losses included in net income - Tax Amount	2.8	(0.9)	3.3	(0.1)
Reclassification of losses included in net income- Net of Tax	(3.3)	1.7	(4.2)	0.3
Available for sale securities:
Net unrealized gains on available for sale securities - Pre Tax	0.6	0.6	1.1	1.2
Net unrealized gains on available for sale securities - Net of Tax	0.6	0.6	1.1	1.2
Pension and Other Retirement Benefits:
Amortization of actuarial losses and prior service costs included in net income - Pre Tax	1.9	2.3	4.3	4.9
Amortization of actuarial losses and prior service costs included in net income - Tax	(0.8)	(0.9)	(1.7)	(1.9)
Amortization of actuarial losses and prior service costs included in net income - Net of Tax	1.1	1.4	2.6	3.0
Net actuarial losses and prior service costs - Pre Tax	7.9	5.3	7.9	5.3
Net actuarial losses and prior service costs - Tax	(3.0)	(2.0)	(3.0)	(2.0)
Net actuarial losses and prior service costs - Net of Tax	4.9	3.3	4.9	3.3
Total other comprehensive income (loss) - Pre Tax	44.5	(39.7)	60.1	11.8
Total other comprehensive income (loss) - Tax	12.5	24.4	9.9	10.9
Total other comprehensive income (loss) - Net of Tax	57.0	(15.3)	70.0	22.7
Comprehensive income	370.6	242.8	729.5	467.4
Less: Comprehensive income attributable to noncontrolling interests and redeemable noncontrolling interest	10.8	2.6	16.5	4.8
Comprehensive income attributable to Moody's	$ 359.8	$ 240.2	$ 713.0	$ 462.6