Interest and Other (Income) Expenses, Net - Schedule of Interest and Other (Income) Expenses, Net (Parenthetical) (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Apr. 03, 2019	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Manpower Switzerland | Interest and Other Expenses (Income), Net
Other Non Operating Income Expense [Line Items]
Gain on acquisition of remaining controlling interest	$ 80.4	$ 80.4	$ 80.4	$ 80.4	$ 80.4