Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
ASSETS:
Cash and cash equivalents	$ 999.3		$ 2,574.8
Marketable securities	5.2		16.0
Accounts receivable, net of allowance of $65.7 and $59.0, respectively	3,830.2		4,496.6
Expenditures billable to clients	1,551.0		1,318.8
Other current assets	377.1		332.1
Total current assets	6,762.8		8,738.3
Furniture, equipment and leasehold improvements, net of accumulated depreciation of $1,160.2 and $1,134.9, respectively	490.5		504.8
Deferred income taxes	171.3		160.5
Goodwill	3,609.3		3,580.6
Other non-current assets	498.1		509.7
TOTAL ASSETS	11,532.0		13,493.9
LIABILITIES:
Accounts payable	5,705.6		6,584.8
Accrued liabilities	553.3		728.2
Short-term borrowings	186.3		172.1
Current portion of long-term debt	2.2	[1]	216.6	[1]
Total current liabilities	6,447.4		7,701.7
Long-term debt	1,481.0		2,060.8
Deferred compensation	483.3		489.0
Other non-current liabilities	557.2		558.6
TOTAL LIABILITIES	8,968.9		10,810.1
Redeemable noncontrolling interests (see Note 5)	229.6		227.2
STOCKHOLDERS' EQUITY:
Preferred stock	221.5		221.5
Common stock	51.2		48.8
Additional paid-in capital	2,754.1		2,465.4
Retained earnings	710.4		738.3
Accumulated other comprehensive loss, net of tax	(369.3)		(288.0)
Stockholders Equity Subtotal Before Treasury Stock	3,367.9		3,186.0
Less: Treasury stock	(1,065.3)		(765.4)
Total IPG stockholders' equity	2,302.6		2,420.6
Noncontrolling interests	30.9		36.0
TOTAL STOCKHOLDERS' EQUITY	2,333.5		2,456.6
TOTAL LIABILITIES AND EQUITY	$ 11,532.0		$ 13,493.9

[1] We included our 4.75% Convertible Senior Notes due 2023 (the “4.75% Notes”) in the current portion of long-term debt on our December 31, 2012 Consolidated Balance Sheet because holders of the 4.75% Notes had an option to require us to repurchase their Notes for cash, stock or a combination, at our election, at par on March 15, 2013. The 4.75% Notes were retired in the first quarter of 2013.