Fair Value Measurements - Schedule of Fair Values of Long-term Borrowings (Details) - USD ($) $ in Millions	Jul. 04, 2021	Jan. 03, 2021
Dollar Term Loan Facility
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term borrowings, fair value	$ 1,531.9	$ 2,627.7
Euro Term Loan Facility
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term borrowings, fair value	380.8	401.1
2028 Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term borrowings, fair value	442.5	710.4
2025 Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term borrowings, fair value	$ 256.8	$ 424.0