Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 373.7	$ 152.8
Funds receivable and funds held on behalf of clients	1,073.1	1,729.9
Accounts receivable, net of allowance for doubtful accounts of $14.6 and $13.2, respectively	686.6	669.7
Contract asset	27.7	20.0
Prepaid expenses and other current assets	167.3	204.5
Restricted cash and cash equivalents	8.3	9.0
Total current assets	2,336.7	2,785.9
Property, plant and equipment, net (Note 2)	436.4	466.4
Operating lease right-of-use assets	358.0	375.3
Investments (Note 3)	175.5	160.1
Unconsolidated affiliates (Note 4)	228.2	234.8
Contract asset	78.6	78.6
Goodwill (Note 6)	7,859.7	7,959.9
Intangible and other assets, net of accumulated amortization of $2,159.9 and $2,022.0, respectively	4,501.0	4,680.1
Total assets	15,974.1	16,741.1
Current liabilities:
Current portion of long-term debt (Note 7)	320.0	76.3
Client funds obligations	1,073.1	1,729.9
Accounts payable	42.8	36.9
Income taxes payable	7.9	13.3
Accrued employee compensation and benefits	163.4	290.6
Interest payable	0.2	27.6
Other accrued expenses	253.9	268.4
Deferred revenue	348.0	333.2
Total current liabilities	2,209.3	2,776.2
Long-term debt, net of current portion (Note 7)	6,986.3	7,077.8
Operating lease liabilities	331.8	348.6
Other long-term liabilities	317.9	333.7
Deferred income taxes	1,041.2	1,088.7
Total liabilities	10,886.5	11,625.0
Commitments and contingencies (Note 13)
Stockholders’ equity (Note 8):
Preferred stock, $0.01 par value per share, 5.0 million shares authorized; no shares issued
Common stock	2.6	2.6
Additional paid-in capital	4,324.3	4,266.9
Accumulated other comprehensive loss	(406.1)	(253.0)
Retained earnings	1,245.1	1,177.9
Stockholders' equity before treasury stock	5,165.9	5,194.4
Less: cost of common stock in treasury, 2.9 million shares	(78.3)	(78.3)
Total stockholders’ equity	5,087.6	5,116.1
Total liabilities and stockholders’ equity	15,974.1	16,741.1
Class A Non-Voting Common Stock [Member]
Stockholders’ equity (Note 8):
Common stock