Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Operating revenues
Revenues	$ 296.8	$ 366.4	$ 663.4	$ 723.6
Operating expenses:
Cost of services (exclusive of depreciation and amortization)	185.1	227.7	416.1	446.1
Selling, general and administrative	34.3	33.7	72.3	67.3
Depreciation and amortization	19.6	22.1	42.1	43.9
Total operating expenses	239.0	283.5	530.5	557.3
Operating profit	57.8	82.9	132.9	166.3
Interest expense, net	13.8	11.9	29.8	21.6
Other expense (income), net	0.1	(0.2)	(0.6)	(0.1)
Income before income taxes	43.9	71.2	103.7	144.8
Income taxes	10.7	19.9	25.8	39.0
Net income	$ 33.2	$ 51.3	$ 77.9	$ 105.8
Net income per share
Basic (in dollars per share)	$ 0.25	$ 0.38	$ 0.58	$ 0.79
Diluted (in dollars per share)	$ 0.25	$ 0.38	$ 0.58	$ 0.79