Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 154.6	$ 166.7
Funds receivable and funds held on behalf of clients	954.8	1,014.7
Accounts receivable, net of allowance for doubtful accounts of $9.9 and $9.4, respectively	686.5	681.7
Contract asset	12.7	18.5
Prepaid expenses and other current assets	150.1	154.5
Prepaid income taxes	12.8	5.6
Restricted cash and cash equivalents	5.6	6.4
Total current assets	1,977.1	2,048.1
Property, plant and equipment, net (Note 2)	516.5	553.2
Operating lease right-of-use assets (Note 3)	372.9
Investments (Note 4)	190.5	190.5
Unconsolidated affiliates (Note 5)	239.3	239.3
Deferred income taxes	5.5	4.8
Contract asset	33.2	31.5
Goodwill (Note 7)	7,882.4	7,858.0
Intangible and other assets, net of accumulated amortization of $1,534.8 and $1,360.2, respectively	5,031.9	5,182.1
Total assets	16,249.3	16,107.5
Current liabilities:
Current portion of long-term debt (Note 8)	85.8	87.5
Client funds obligations	954.8	1,014.7
Accounts payable	41.8	41.4
Income taxes payable		11.1
Accrued employee compensation and benefits	153.9	322.0
Interest payable	2.4	0.2
Other accrued expenses	262.7	199.2
Deferred revenue	260.7	245.7
Total current liabilities	1,762.1	1,921.8
Long-term debt, net of current portion (Note 8)	8,030.3	8,168.5
Operating lease liabilities (Note 3)	348.6
Other long-term liabilities	204.4	235.5
Deferred income taxes	1,170.4	1,201.7
Total liabilities	11,515.8	11,527.5
Commitments and contingencies (Note 14)
Stockholders’ equity (Note 9):
Preferred stock, $0.01 par value per share, 5.0 million shares authorized; no shares issued
Common stock	2.5	2.5
Additional paid-in capital	4,147.4	4,091.4
Accumulated other comprehensive loss	(301.2)	(343.0)
Retained earnings	902.8	847.1
Stockholders' equity before treasury stock	4,751.5	4,598.0
Less: cost of common stock in treasury, 1.6 million shares	(18.0)	(18.0)
Total stockholders’ equity	4,733.5	4,580.0
Total liabilities and stockholders’ equity	16,249.3	16,107.5
Class A Non-Voting Common Stock [Member]
Stockholders’ equity (Note 9):
Common stock