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Consolidated Statements of Cash Flows - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Statement Of Cash Flows [Abstract] |  |  |
Net (loss) income | $ (4.0) | $ 78.7 | $ (61.1)
Loss from discontinued operations |  |  | 25.8
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: |  |  |
Deferred income tax benefit | (7.0) | (69.4) | (16.1)
Depreciation and amortization | 51.8 | 57.1 | 56.6
Amortization of debt issuance costs and debt discount | 1.2 | 1.2 | 2.1
Loss on debt extinguishment |  |  | 25.7
Lease abandonment costs | 16.8 |  |
Net periodic pension and postretirement cost | 3.3 | 5.2 | 2.7
Provision for doubtful accounts | 2.0 | 3.2 | 0.7
Share-based compensation | 65.8 | 36.5 | 23.2
Other | 1.0 | (0.4) | (0.4)
Changes in operating assets and liabilities excluding effects of acquisitions and divestitures: |  |  |
Trade and other receivables | (12.0) | (16.4) | (3.6)
Prepaid expenses and other current assets | (6.8) | (8.0) | 0.6
Accounts payable and other accrued expenses | (1.4) | 3.8 | (6.4)
Deferred revenue | (1.2) | 0.8 | 7.0
Employee compensation and benefits | (104.0) | (11.1) | (22.1)
Accrued interest |  |  | (15.7)
Accrued taxes | (3.7) | (11.1) | 8.4
Other assets and liabilities | (32.0) | (19.5) | (16.7)
Net cash (used in) provided by operating activities—continuing operations | (30.2) | 50.6 | 10.7
Net cash used in operating activities—discontinued operations |  |  | (1.2)
Net cash (used in) provided by operating activities | (30.2) | 50.6 | 9.5
Cash Flows from Investing Activities |  |  |
Purchase of customer trust funds marketable securities | (212.4) | (408.4) | (855.2)
Proceeds from sale and maturity of customer trust funds marketable securities | 369.3 | 374.5 | 844.3
Expenditures for property, plant, and equipment | (18.1) | (16.3) | (8.0)
Expenditures for software and technology | (41.7) | (38.9) | (32.2)
Acquisition costs, net of cash acquired | (58.3) | (30.2) |
Net cash provided by (used in) investing activities | 38.8 | (119.3) | (51.1)
Cash Flows from Financing Activities |  |  |
Increase (decrease) in customer trust funds obligations, net | 483.6 | 529.9 | (1,415.1)
Net proceeds from issuance of stock |  |  | 595.0
Repayment of long-term debt obligations | (10.0) | (7.2) | (1,134.0)
Proceeds from revolving credit facility | 295.0 |  |
Repayment of revolving credit facility | (295.0) |  |
Proceeds from issuance of common stock under share-based compensation plans | 91.7 | 87.0 | 45.8
Proceeds from debt issuance |  |  | 680.0
Payment of debt refinancing costs |  |  | (23.3)
Net cash provided by (used in) financing activities | 565.3 | 609.7 | (1,251.6)
Effect of Exchange Rate Changes on Cash | (4.0) | 11.3 | (12.8)
Net increase (decrease) in cash and equivalents | 569.9 | 552.3 | (1,306.0)
Elimination of cash from discontinued operations |  |  | 0.5
Cash, restricted cash, and equivalents at beginning of period | 1,658.6 | 1,106.3 | 2,411.8
Cash, restricted cash, and equivalents at end of period | 2,228.5 | 1,658.6 | 1,106.3
Reconciliation of cash, restricted cash, and equivalents to the consolidated balance sheets |  |  |
Cash and equivalents | 188.2 | 281.3 | 217.8
Restricted cash and equivalents included in customer trust funds | 2,040.3 | $ 1,377.3 | $ 888.5
Restricted Cash and Cash Equivalents, Current, Asset, Statement of Financial Position [Extensible List] |  | us-gaap:FundsHeldForClients | us-gaap:FundsHeldForClients
Cash, restricted cash, and equivalents at end of period | 2,228.5 | $ 1,658.6 | $ 1,106.3
Supplemental Cash Flow Information: |  |  |
Cash paid for interest | 26.7 | 37.4 | 74.5
Cash paid for income taxes | 4.2 | 36.2 | 21.1
Cash received from income tax refunds | $ 9.6 | $ 0.3 | $ 4.4

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