Schedule 1 - STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Millions	3 Months Ended																12 Months Ended
	Dec. 28, 2018		Sep. 28, 2018	[2]	Jun. 29, 2018	[3]	Mar. 30, 2018		Dec. 29, 2017		Sep. 29, 2017	[6]	Jun. 30, 2017	[7]	Mar. 31, 2017		Dec. 28, 2018	Dec. 29, 2017	Dec. 30, 2016
Operating activities:
Net income	$ 41.8	[1]	$ 47.6		$ 34.8		$ 32.1	[4]	$ 0.4	[5]	$ 37.6		$ 40.1		$ 30.9	[8]	$ 156.3	$ 109.0	$ 120.5
Adjustments to reconcile net income to net cash used in operating activities:
Stock-based compensation																	18.9	18.1	16.5
Income tax expense																	66.9	128.6	76.4
Net cash used in operating activities																	137.7	183.8	279.1
Investing activities:
Net cash used in investing activities																	(183.4)	(41.1)	(37.3)
Financing activities:
Proceeds from stock options exercised																	1.5	5.0	2.4
Other, net																	0.0	(0.2)	(0.6)
Net cash provided by financing activities																	1.6	(136.1)	(273.3)
Increase in cash and cash equivalents																	(44.1)	6.6	(31.5)
Parent Company [Member]
Operating activities:
Net income																	156.3	109.0	120.5
Adjustments to reconcile net income to net cash used in operating activities:
Equity in earnings of subsidiaries																	(154.1)	(108.0)	(120.0)
Dividend from subsidiary																	8.0	3.7	4.8
Stock-based compensation																	2.4	2.5	2.3
Income tax expense																	0.7	0.6	0.2
Intercompany transactions																	(14.7)	(13.2)	(9.3)
Changes in assets and liabilities, net																	(0.1)	(0.1)	0.5
Net cash used in operating activities																	(1.5)	(5.5)	(1.0)
Investing activities:
Net cash used in investing activities																	0.0	0.0	0.0
Financing activities:
Proceeds from stock options exercised																	1.5	5.0	2.4
Loans from (to) subsidiaries, net																	0.0	0.7	(0.7)
Other, net																	0.0	(0.2)	(0.6)
Net cash provided by financing activities																	1.5	5.5	1.1
Increase in cash and cash equivalents																	0.0	0.0	0.1
Cash and cash equivalents at beginning of period							$ 0.2								$ 0.2		0.2	0.2	0.1
Cash and cash equivalents at end of period	$ 0.2								$ 0.2								$ 0.2	$ 0.2	$ 0.2

[1] In the fourth quarter of 2018, "Operating income" includes $8.7 million of intangible asset amortization and $0.2 million of U.K. facility relocation costs. "Income before income taxes" includes a $4.6 million loss on extinguishment of debt.

[2] In the third quarter of 2018, "Operating income" includes $9.6 million of intangible asset amortization, a restructuring charge of $0.2 million, $0.3 million of acquisition and integration costs and $0.2 million of U.K. facility relocation costs.

[3] In the second quarter of 2018, "Operating income" includes $9.7 million of intangible asset amortization, a restructuring charge of $9.2 million, $2.3 million of acquisition and integration costs, $2.6 million of CEO retirement agreement expense and $0.4 million of U.K. facility relocation costs.

[4] In the first quarter of 2018, "Operating income" includes $9.3 million of intangible asset amortization, $0.3 million of acquisition and integration costs and $0.2 million of U.K. facility relocation costs.

[5] In the fourth quarter of 2017, "Operating income" includes $9.0 million of intangible asset amortization, $1.5 million of acquisition and integration costs and an intangible asset impairment charge of $5.7 million.

[6] In the third quarter of 2017, "Operating income" includes $9.1 million of intangible asset amortization and $0.8 million of acquisition and integration costs.

[7] In the second quarter of 2017, "Operating income" includes $9.0 million of intangible asset amortization.

[8] In the first quarter of 2017, "Operating income" includes $9.0 million of intangible asset amortization.