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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Cash flows from operating activities: |  |
Net income | $ 1,140 | $ 299
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 201 | 174
Provision for credit losses | 2 | 13
Deferred income tax (benefit) provision | (89) | 23
Stock-based compensation expense | 39 | 31
Gain on disposition of investment | (314) | 0
Other, net | 1 | 3
Changes in operating assets and liabilities: |  |
Accounts receivable | 265 | (75)
Accounts payable and accrued expenses | (199) | 42
Income taxes payable | 85 | 51
Termination of interest rate swap agreements | 0 | 40
Other assets and liabilities, net | 60 | 1
Net cash provided by operating activities | 1,191 | 602
Cash flows from investing activities: |  |
Business acquisitions, net of cash acquired | (231) | (228)
Capital expenditures | (170) | (165)
Proceeds from disposition of investment | 755 | 0
Increase in investments and other assets | (10) | (18)
Net cash provided by (used in) investing activities | 344 | (411)
Cash flows from financing activities: |  |
Proceeds from borrowings | 0 | 749
Repayments of debt | (1) | (1,001)
Purchases of treasury stock | (1,910) | (75)
Exercise of stock options | 68 | 117
Employee payroll tax withholdings on stock issued under stock-based compensation plans | (22) | (13)
Dividends paid | (156) | (146)
Distributions to noncontrolling interest partners | (53) | (10)
Other financing activities, net | (59) | (16)
Net cash used in financing activities | (2,133) | (395)
Net change in cash and cash equivalents and restricted cash | (598) | (204)
Cash and cash equivalents and restricted cash, beginning of period | 1,158 | 1,192
Cash and cash equivalents and restricted cash, end of period | $ 560 | $ 988

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