Concentration of Credit Risk (Tables)

6 Months Ended

Jul. 27, 2019

Schedule that Represents A Significant Portion of the Company’s Customer Base and Each Over 10% of Total Revenue

Customers whose combined amounts of accounts receivable and contract assets, net exceeded 10% of total combined accounts receivable and contract assets, net as of July 27, 2019 or January 26, 2019 were as follows (dollars in millions):



	July 27, 2019			January 26, 2019
	Amount		% of Total	Amount		% of Total
Verizon Communications Inc.	$	481.8	42.3%	$	298.4	36.2%
CenturyLink, Inc.	$	171.4	15.0%	$	147.2	17.9%
Comcast Corporation	$	142.9	12.5%	$	127.2	15.4%
AT&T Inc.	$	112.3	9.8%	$	90.6	11.0%

Total contract revenues by customer type during the three and six months ended July 27, 2019 and July 28, 2018 were as follows (dollars in millions):



	For the Three Months Ended						For the Six Months Ended
	July 27, 2019			July 28, 2018			July 27, 2019			July 28, 2018
	Amount		% of Total	Amount		% of Total	Amount		% of Total	Amount		% of Total
Telecommunications	$	804.4	91.0%	$	726.7	90.9%	$	1,565.8	91.2%	$	1,393.9	91.1%
Underground facility locating	53.8		6.1	49.0		6.1	102.0		5.9	94.1		6.1
Electrical and gas utilities and other	26.0		2.9	23.8		3.0	50.2		2.9	42.8		2.8
Total contract revenues	$	884.2	100.0%	$	799.5	100.0%	$	1,718.0	100.0%	$	1,530.8	100.0%

Customers whose contract revenues exceeded 10% of total contract revenues during the three or six months ended July 27, 2019 or July 28, 2018, as well as total contract revenues from all other customers combined, were as follows (dollars in millions):



	For the Three Months Ended						For the Six Months Ended
	July 27, 2019			July 28, 2018			July 27, 2019			July 28, 2018
	Amount		% of Total	Amount		% of Total	Amount		% of Total	Amount		% of Total
Verizon Communications Inc.	$	205.0	23.2%	$	147.3	18.4%	$	384.8	22.4%	$	269.5	17.6%
AT&T Inc.	183.3		20.7	165.2		20.7	392.5		22.8	342.2		22.4
CenturyLink, Inc.	138.7		15.7	107.6		13.5	248.5		14.5	197.2		12.9
Comcast Corporation	133.2		15.1	171.2		21.4	270.3		15.7	330.3		21.6
Total other customers combined	224.0		25.3	208.2		26.0	421.9		24.6	391.6		25.5
Total contract revenues	$	884.2	100.0%	$	799.5	100.0%	$	1,718.0	100.0%	$	1,530.8	100.0%