Defined Benefit Plans - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 02, 2019	Dec. 31, 2018	Feb. 03, 2018	Dec. 31, 2017	Jan. 28, 2017
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
Fiscal 2024	$ 3.9
SERP
Defined Benefit Plan Disclosure [Line Items]
Discount rate assumed as part of the actuarial valuation performed to calculate the projected benefit obligation and fair value of the plan assets (as a percent)	3.80%		3.50%
Amount of actuarial losses, included in comprehensive income (loss), that are expected to be recognized as a component of net periodic defined benefit pension cost in the next fiscal year	$ 0.1
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
Fiscal 2020	1.7
Fiscal 2021	2.9
Fiscal 2022	3.9
Fiscal 2023	3.9
Aggregate benefits projected to be paid in the following five fiscal years	$ 18.3
Pension Plan | SWITZERLAND
Defined Benefit Plan Disclosure [Line Items]
Discount rate assumed as part of the actuarial valuation performed to calculate the projected benefit obligation and fair value of the plan assets (as a percent)	0.70%		0.60%
Amount of actuarial losses, included in comprehensive income (loss), that are expected to be recognized as a component of net periodic defined benefit pension cost in the next fiscal year	$ 0.4
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
Minimum investment return (as a percent)		1.00%		1.00%
Expected return on plan assets assumed as a part of the actuarial valuation performed to calculate the projected benefit obligation and plan assets (as a percent)	1.20%		1.40%
Other assets | SERP
Defined Benefit Plan Disclosure [Line Items]
Cash surrender values of the insurance policies held in a rabbi trust	$ 61.7		$ 64.5
Other income/expense | SERP
Defined Benefit Plan Disclosure [Line Items]
Gains (losses) as a result of changes in value of the insurance policy investments, included in other income and expense	$ (1.1)		$ 7.7		$ 6.9