Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Cash and cash equivalents	$ 1,587.7	$ 1,025.8
Accounts receivable, less allowance for doubtful accounts of $125.3 and $113.5, respectively	4,535.7	5,273.1
Prepaid expenses and other assets	224.7	185.6
Total current assets	6,348.1	6,484.5
Other Assets:
Goodwill	1,198.6	1,260.1
Intangible assets, less accumulated amortization of $412.8 and $389.4, respectively	251.5	268.6
Operating lease right-of-use assets	407.9	448.5
Other assets	610.7	618.8
Total other assets	2,468.7	2,596.0
Property and Equipment:
Land, buildings, leasehold improvements and equipment	599.6	605.5
Less: accumulated depreciation and amortization	467.1	462.2
Net property and equipment	132.5	143.3
Total assets	8,949.3	9,223.8
Current Liabilities:
Accounts payable	2,359.9	2,474.9
Employee compensation payable	213.0	206.4
Accrued liabilities	555.6	545.4
Accrued payroll taxes and insurance	622.3	649.7
Value added taxes payable	495.5	504.0
Short-term borrowings and current maturities of long-term debt	29.2	61.0
Total current liabilities	4,275.5	4,441.4
Other Liabilities:
Long-term debt	1,058.5	1,012.4
Long-term operating lease liability	318.8	336.7
Other long-term liabilities	691.1	671.8
Total other liabilities	2,068.4	2,020.9
ManpowerGroup shareholders' equity
Preferred stock, $.01 par value, authorized 25,000,000 shares, none issued	0.0	0.0
Common stock, $.01 par value, authorized 125,000,000 shares, issued 117,543,804 and 117,190,883 shares, respectively	1.2	1.2
Capital in excess of par value	3,395.1	3,370.6
Retained earnings	3,378.5	3,494.1
Accumulated other comprehensive loss	(432.8)	(441.0)
Treasury stock at cost, 59,460,085 and 58,517,128 shares, respectively	(3,753.3)	(3,681.9)
Total ManpowerGroup shareholders’ equity	2,588.7	2,743.0
Noncontrolling interests	16.7	18.5
Total shareholders’ equity	2,605.4	2,761.5
Total liabilities and shareholders’ equity	$ 8,949.3	$ 9,223.8