What did Amazon do with the cash flow that it generated between 2014 and 2016?

AMAZON.COM, INC Christopher Noe and Joseph Weber Exhibit 2 Amazon.com, Inc. 2014-16 Cash Flow Statements (s Millions) Year Ended December 31, 2018 2015 15,890 14,557 2014 8,658 2,371 596 (241) 8,116 6.281 4.746 2,975 160 (20) (246) (829) 2.119 155 250 81 (119) 1.497 129 59 (316) (6) CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD OPERATING ACTIVITIES: Net income (los) Adjustments to reconcile not income (loss) to not cash from operating activities: Depreciation of property and equipment, including intemal-use software and website development, and other amortization, including capitalized content costs Stock-based compensation Other operating expense, net Other expense (income), net Deferred income taxes Excess tax benefits from stock-based compensation Changes in operating assets and liabilities: Inventories Accounts receivable, net and other Accounts payable Accrued expenses and other Additions to uneared revenue Amortization of previously uneared revenue Net cash provided by (used in) operating activities INVESTING ACTIVITIES: Purchases of property and equipment, including internal-use software and website development, net Acquisitions, net of cash acquired, and other Sales and maturities of marketable securities Purchases of marketable securities Net cash provided by (used in) investing activities FINANCING ACTIVITIES: Excess tax benefits from stock-based compensation Proceeds from issuance of long-term debt Repayments of long-term debt and other Principal repayments of capital lease obligations Principal repayments of finance lease obligations Net cash provided by used in) financing activities Foreign currency effect on cash and cash equivalents Net increase (decrease in cash and cash equivalents CASH AND CASH EQUIVALENTS, END OF PERIOD (1426) (3,367) 5,030 1,724 11,931 (9,976) 16,443 (2,187) (1,755) 4,294 913 7,401 (6.109) 11,920 (1,193) (1,039) 1.759 706 4.433 (3,692) 6,842 (6,737) (4,589) (4,893) (116) 4,733 (7.756) (9,876) (795) 3,025 (4.091) (6,450) (979) 3,349 (2,542) (5,065) 829 621 (354) (3,860) (147) (2,911) (212) 3,444 19,334 119 353 (1,652) (2.462) (121) (3,763) (374) 1.333 15,890 6 6,359 (513) (1.285) (135) 4.432 (310) 5,899 14,557 Source: Amazon.com, Inc. 10-K, December 31, 2016