GOODWILL AND OTHER ACQUIRED INTANGIBLE ASSETS (Tables)

9 Months Ended

Sep. 30, 2017

Activity in Goodwill

	Nine months ended September 30, 2017
	MIS						MA						Consolidated
	Gross goodwill		Accumulated impairment charge		Net goodwill		Gross goodwill		Accumulated impairment charge		Net goodwill		Gross goodwill		Accumulated impairment charge		Net goodwill
Balance at beginning of year	$	277.0	$	-	$	277.0	$	758.8	$	(12.2)	$	746.6	$	1,035.8	$	(12.2)	$	1,023.6
Additions/adjustments		-		-		-		2,639.7		-		2,639.7		2,639.7		-		2,639.7
Foreign currency translation adjustments		10.5		-		10.5		48.3		-		48.3		58.8		-		58.8
Ending balance	$	287.5	$	-	$	287.5	$	3,446.8	$	(12.2)	$	3,434.6	$	3,734.3	$	(12.2)	$	3,722.1
	Year ended December 31, 2016
	MIS						MA						Consolidated
	Gross goodwill		Accumulated impairment charge		Net goodwill		Gross goodwill		Accumulated impairment charge		Net goodwill		Gross goodwill		Accumulated impairment charge		Net goodwill
Balance at beginning of year	$	284.4	$	-	$	284.4	$	704.1	$	(12.2)	$	691.9	$	988.5	$	(12.2)	$	976.3
Additions/adjustments		-		-		-		61.0		-		61.0		61.0		-		61.0
Goodwill derecognized upon sale of subsidiary		(3.2)		-		(3.2)		-		-		-		(3.2)		-		(3.2)
Foreign currency translation adjustments		(4.2)		-		(4.2)		(6.3)		-		(6.3)		(10.5)		-		(10.5)
Ending balance	$	277.0	$	-	$	277.0	$	758.8	$	(12.2)	$	746.6	$	1,035.8	$	(12.2)	$	1,023.6

Acquired Intangible Assets and Related Amortization

		September 30,		December 31,
		2017		2016
Customer relationships		$	1,325.4	$	310.1
Accumulated amortization			(144.4)		(124.4)
	Net customer relationships		1,181.0		185.7
Trade secrets			30.2		29.9
Accumulated amortization			(27.6)		(25.6)
	Net trade secrets		2.6		4.3
SoftwareSoftware/Product Technology			354.1		87.7
Accumulated amortization			(70.6)		(54.9)
	Net software		283.5		32.8
Trade names			160.7		75.3
Accumulated amortization			(24.4)		(19.9)
	Net trade names		136.3		55.4
Other (1)			57.6		43.5
Accumulated amortization			(27.9)		(25.3)
	Net other		29.7		18.2
Total acquired intangible assets, net		$	1,633.1	$	296.4
	(1) Other intangible assets primarily consist of databases, covenants not to compete, and acquired ratings methodologies and models.

Amortization Expense Relating to Acquired Intangible Assets

	Three Months Ended				Nine months ended
	September 30,				September 30,
	2017		2016		2017		2016
Amortization expense	$	18.8	$	8.9	$	35.9	$	25.5

Estimated Future Amortization Expense for Acquired Intangible Assets Subject to Amortization

Year Ending December 31,
2017 (after September 30)	$	25.4
2018		99.8
2019		95.8
2020		93.5
2021		93.3
Thereafter		1,225.3
Total estimated future amortization	$	1,633.1