Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
ASSETS:
Cash and cash equivalents	$ 3,270.0	$ 2,509.0
Accounts receivable, net of allowance of $68.5 and $98.3, respectively	5,177.7	4,646.4
Accounts receivable, billable to clients	2,347.2	1,820.7
Assets held for sale	8.2	0.8
Other current assets	428.7	390.7
Total current assets	11,231.8	9,367.6
Property and equipment, net of accumulated depreciation of $1,201.6 and $1,133.9 respectively	675.8	690.3
Deferred income taxes	301.4	302.0
Goodwill	4,908.7	4,945.5	$ 4,894.4
Other intangible assets	847.5	933.6
Operating Lease, Right-of-Use Asset	1,544.4	1,379.3		$ 1,421.1
Other non-current assets	399.6	424.4
TOTAL ASSETS	19,909.2	18,042.7
LIABILITIES:
Accounts payable	8,960.0	7,269.7
Accrued liabilities	918.1	832.4
Contract liabilities	688.5	657.8
Short-term borrowings	47.5	48.0
Current portion of long-term debt	0.7	502.5
Operating Lease, Liability, Current	265.8	268.5
Liabilities held for sale	9.4	1.6
Total current liabilities	10,890.0	9,580.5
Long-term debt	2,908.6	2,915.8
Operating Lease, Liability, Noncurrent	1,576.0	1,441.0
Deferred compensation	329.1	413.2
Other non-current liabilities	600.7	655.2
TOTAL LIABILITIES	16,304.4	15,005.7
Redeemable noncontrolling interests	15.6	93.1	164.7		$ 167.9
STOCKHOLDERS' EQUITY:
Common stock, $0.10 par value, shares authorized: 800.0 shares issued: 2021 - 394.3; 2020 - 390.9 shares outstanding: 2021 - 394.3; 2020 - 390.9	39.3	39.0
Additional paid-in capital	1,226.6	1,099.3
Retained earnings	3,154.3	2,636.9
Accumulated other comprehensive loss, net of tax	(894.2)	(880.2)	(930.0)
Total IPG stockholders' equity	3,526.0	2,895.0
Noncontrolling interests	63.2	48.9
TOTAL STOCKHOLDERS' EQUITY	3,589.2	2,943.9	$ 2,825.6		$ 2,432.8
TOTAL LIABILITIES AND EQUITY	$ 19,909.2	$ 18,042.7