Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Cash and cash equivalents	$ 1,522.7	$ 1,567.1
Accounts receivable, less allowance for doubtful accounts of $124.1 and $128.1, respectively	4,892.7	4,912.4
Prepaid expenses and other assets	208.9	186.9
Total current assets	6,624.3	6,666.4
Other Assets:
Goodwill	1,215.0	1,225.8
Intangible assets, less accumulated amortization of $427.0 and $425.4, respectively	240.4	248.6
Operating lease right-of-use assets	378.2	400.7
Other assets	660.0	651.6
Total other assets	2,493.6	2,526.7
Property and Equipment:
Land, buildings, leasehold improvements and equipment	599.0	614.7
Less: accumulated depreciation and amortization	472.4	479.6
Net property and equipment	126.6	135.1
Total assets	9,244.5	9,328.2
Current Liabilities:
Accounts payable	2,723.5	2,527.4
Employee compensation payable	205.7	231.8
Accrued liabilities	590.4	602.1
Accrued payroll taxes and insurance	692.1	752.0
Value added taxes payable	513.6	551.1
Short-term borrowings and current maturities of long-term debt	25.1	20.4
Total current liabilities	4,750.4	4,684.8
Other Liabilities:
Long-term debt	1,057.5	1,103.5
Long-term operating lease liability	285.3	305.1
Other long-term liabilities	773.9	781.2
Total other liabilities	2,116.7	2,189.8
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 117,725,183 and 117,555,991 shares, respectively	1.2	1.2
Capital in excess of par value	3,411.0	3,402.5
Retained earnings	3,450.8	3,388.8
Accumulated other comprehensive loss	(437.8)	(397.3)
Treasury stock at cost, 63,086,793 and 61,990,021 shares, respectively	(4,058.9)	(3,954.2)
Total ManpowerGroup shareholders’ equity	2,366.3	2,441.0
Noncontrolling interests	11.1	12.6
Total shareholders’ equity	2,377.4	2,453.6
Total liabilities and shareholders’ equity	$ 9,244.5	$ 9,328.2