GOODWILL AND OTHER ACQUIRED INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2018

Activity in Goodwill

	Three Months Ended March 31, 2018
	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	$	285.2	$	-	$	285.2	$	3,480.2	$	(12.2)	$	3,468.0	$	3,765.4	$	(12.2)	$	3,753.2
Foreign currency translation adjustments		6.4		-		6.4		71.9		-		71.9		78.3		-		78.3
Ending balance	$	291.6	$	-	$	291.6	$	3,552.1	$	(12.2)	$	3,539.9	$	3,843.7	$	(12.2)	$	3,831.5
	Year ended December 31, 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		-		-		-		2,622.6		-		2,622.6		2,622.6		-		2,622.6
Foreign currency translation adjustments		8.2		-		8.2		98.8		-		98.8		107.0		-		107.0
Ending balance	$	285.2	$	-	$	285.2	$	3,480.2	$	(12.2)	$	3,468.0	$	3,765.4	$	(12.2)	$	3,753.2

Acquired Intangible Assets and Related Amortization

		March 31,		December 31,
		2018		2017
Customer relationships		$	1,371.7	$	1,345.1
Accumulated amortization			(175.4)		(159.9)
	Net customer relationships		1,196.3		1,185.2
Trade secrets			30.1		30.2
Accumulated amortization			(28.1)		(28.1)
	Net trade secrets		2.0		2.1
Software/product technology			366.1		358.6
Accumulated amortization			(86.7)		(78.0)
	Net Software/product technology		279.4		280.6
Trade names			164.6		161.6
Accumulated amortization			(29.2)		(26.7)
	Net trade names		135.4		134.9
Other (1)			58.2		57.4
Accumulated amortization			(29.7)		(28.6)
	Net other		28.5		28.8
Total acquired intangible assets, net		$	1,641.6	$	1,631.6
(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
	March 31,
	2018		2017
Amortization expense	$	25.7	$	8.5

Estimated Future Amortization Expense for Acquired Intangible Assets Subject to Amortization

Year Ending December 31,
2018 (after March 31)	$	77.0
2019		98.9
2020		96.5
2021		96.3
2022		95.8
Thereafter		1,177.1
Total estimated future amortization	$	1,641.6