GOODWILL AND OTHER ACQUIRED INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2019

Goodwill And Other Acquired Intangible Assets [Abstract]

Activity in Goodwill

	Three Months Ended March 31, 2019
	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	$	257.8	$	-	$	257.8	$	3,535.7	$	(12.2)	$	3,523.5	$	3,793.5	$	(12.2)	$	3,781.3
Foreign currency translation adjustments		9.4		-		9.4		(28.2)		-		(28.2)		(18.8)		-		(18.8)
Ending balance	$	267.2	$	-	$	267.2	$	3,507.5	$	(12.2)	$	3,495.3	$	3,774.7	$	(12.2)	$	3,762.5
	Year ended December 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
Additions/ adjustments		-		-		-		211.5		-		211.5		211.5		-		211.5
Foreign currency translation adjustments		(27.4)		-		(27.4)		(156.0)		-		(156.0)		(183.4)		-		(183.4)
Ending balance	$	257.8	$	-	$	257.8	$	3,535.7	$	(12.2)	$	3,523.5	$	3,793.5	$	(12.2)	$	3,781.3

Acquired Intangible Assets and Related Amortization

		March 31,		December 31,
		2019		2018
Customer relationships		$	1,360.7	$	1,367.5
Accumulated amortization			(230.2)		(214.2)
	Net customer relationships		1,130.5		1,153.3
Trade secrets			29.9		29.8
Accumulated amortization			(28.3)		(28.2)
	Net trade secrets		1.6		1.6
Software/product technology			349.2		353.3
Accumulated amortization			(107.7)		(101.8)
	Net software/product technology		241.5		251.5
Trade names			155.9		155.1
Accumulated amortization			(36.5)		(34.1)
	Net trade names		119.4		121.0
Other (1)			70.8		70.4
Accumulated amortization			(33.4)		(31.7)
	Net other		37.4		38.7
Total acquired intangible assets, net		$	1,530.4	$	1,566.1
(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,
	2019		2018
Amortization expense	$	26.4	$	25.7

Estimated Future Amortization Expense for Acquired Intangible Assets Subject to Amortization

Year Ending December 31,
2019 (after March 31)	$	71.0
2020		100.5
2021		100.3
2022		100.3
2023		97.3
Thereafter		1,061.0
Total estimated future amortization	$	1,530.4