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UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
OPERATING ACTIVITIES: |  |  |
Net income |  | $ 547 | $ 224
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization |  | 323 | 344
Provision for expected credit losses and chargebacks |  | 88 | 307
Deferred income tax (benefit) expense |  | (343) | 101
Net losses (gains) on equity securities | [1] | 589 | (1,261)
Stock-based compensation expense and other stock-based payments |  | 290 | 179
Operating lease amortization |  | 135 | 137
Amortization of debt discount and debt issuance costs |  | 44 | 48
Unrealized foreign currency transaction (gains) losses on Euro-denominated debt |  | (108) | 139
Impairment of goodwill |  | 0 | 1,062
Impairment of investment | [1] | 0 | 100
Loss on early extinguishment of debt | [2] | 242 | 0
Other |  | 17 | 3
Changes in assets and liabilities: |  |  |
Accounts receivable |  | (1,172) | 554
Prepaid expenses and other current assets |  | (35) | 230
Deferred merchant bookings and other current liabilities |  | 2,083 | (1,593)
Other long-term assets and liabilities |  | (159) | 88
Net cash provided by operating activities |  | 2,541 | 662
INVESTING ACTIVITIES: |  |  |
Purchase of investments |  | (15) | (72)
Proceeds from sale and maturity of investments |  | 8 | 2,997
Additions to property and equipment |  | (203) | (222)
Other investing activities |  | (5) | 0
Net cash (used in) provided by investing activities |  | (215) | 2,703
FINANCING ACTIVITIES: |  |  |
Proceeds from the issuance of long-term debt |  | 2,015 | 4,108
Payments of debt issuance costs |  | (10) | (38)
Payments for redemption and conversion of debt |  | (3,068) | (1,244)
Payments for repurchase of common stock |  | (159) | (1,299)
Other financing activities |  | (12) | 5
Net cash (used in) provided by financing activities |  | (1,234) | 1,532
Effect of exchange rate changes on cash and cash equivalents and restricted cash and cash equivalents |  | (11) | (12)
Net increase in cash and cash equivalents and restricted cash and cash equivalents |  | 1,081 | 4,885
Total cash and cash equivalents and restricted cash and cash equivalents, beginning of period |  | 10,582 | 6,332
Total cash and cash equivalents and restricted cash and cash equivalents, end of period |  | 11,663 | 11,217
SUPPLEMENTAL CASH FLOW INFORMATION: |  |  |
Cash paid during the period for income taxes (see Note 17) |  | 420 | 152
Cash paid during the period for interest |  | $ 231 | $ 158
[1] | See Note 5 for additional information related to the net (losses) gains on equity securities and impairment of investment.
[2] | See Note 9 for additional information related to the loss on early extinguishment of debt.

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