Schedule 1 - STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Details) - USD ($) $ in Millions	3 Months Ended																12 Months Ended
	Dec. 28, 2018	[1]	Sep. 28, 2018	[2]	Jun. 29, 2018	[3]	Mar. 30, 2018	[4]	Dec. 29, 2017	[5]	Sep. 29, 2017	[6]	Jun. 30, 2017	[7]	Mar. 31, 2017	[8]	Dec. 28, 2018	Dec. 29, 2017	Dec. 30, 2016
Condensed Financial Statements, Captions [Line Items]
Operating loss	$ 87.3		$ 89.5		$ 71.3		$ 61.6		$ 80.6		$ 80.8		$ 82.6		$ 68.9		$ 309.7	$ 312.9	$ 295.5
Other income:
Income tax expense																	66.9	128.6	76.4
Net income	$ 41.8		$ 47.6		$ 34.8		$ 32.1		$ 0.4		$ 37.6		$ 40.1		$ 30.9		156.3	109.0	120.5
Comprehensive income																	97.2	149.6	100.1
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Operating loss																	(5.4)	(5.2)	(5.0)
Other income:
Interest income, including intercompany																	8.3	6.8	5.7
Income before income taxes and equity in earnings of subsidiaries																	2.9	1.6	0.7
Income tax expense																	0.7	0.6	0.2
Income before equity in earnings of subsidiaries																	2.2	1.0	0.5
Equity in earnings of subsidiaries																	154.1	108.0	120.0
Net income																	156.3	109.0	120.5
Comprehensive income																	$ 97.2	$ 149.6	$ 100.1

[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.