Fair Value Measurements - Schedule of Fair Value, Assets and Liabilities Measured (Details) - USD ($) $ in Millions	Jun. 25, 2021	Dec. 25, 2020
Forward Contracts [Member]
Prepaid expenses and other:
Prepaid expense and other assets	$ 0.1	$ 1.1
Purchase Option
Other non-current assets:
Assets measured at fair value	1.1
Common Stock Purchase Obligation [Member]
Other liabilities:
Liabilities measured at fair value	14.0	12.6
Pension Obligation [Member]
Other liabilities:
Liabilities measured at fair value	5.5	4.7
Significant Other Observable Inputs (Level 2) [Member] | Forward Contracts [Member]
Prepaid expenses and other:
Prepaid expense and other assets	0.1	1.1
Significant Unobservable Inputs (Level 3) [Member] | Purchase Option
Other non-current assets:
Assets measured at fair value	1.1
Significant Unobservable Inputs (Level 3) [Member] | Common Stock Purchase Obligation [Member]
Other liabilities:
Liabilities measured at fair value	14.0	12.6
Significant Unobservable Inputs (Level 3) [Member] | Pension Obligation [Member]
Other liabilities:
Liabilities measured at fair value	$ 5.5	$ 4.7