SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Dec. 31, 2019

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

SCHEDULE II

GTT COMMUNICATIONS INC.

VALUATION AND QUALIFYING ACCOUNTS

(IN MILLIONS)

	Allowance for Doubtful Accounts
Year	Balance at Beginning of Year		Charged to Cost and Expenses		Deductions			Other		Balance at End of Year
2017	$	2.7	$	15.1	$	(12.8	)	$	0.1	$	5.1
2018	$	5.1	$	13.7	$	(7.7	)	$	—	$	11.1
2019	$	11.1	$	13.2	$	(10.0	)	$	—	$	14.3

	Deferred Tax Asset Valuation Allowance
Year	Balance at Beginning of Year		Charged to Cost and Expenses		Deductions		Other		Balance at End of Year
2017	$	0.3	$	29.0	$	—	$	9.9	$	39.2
2018	$	39.2	$	34.1	$	—	$	89.6	$	162.9
2019	$	162.9	$	17.3	$	—	$	31.2	$	211.4