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Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net income | $ 511 | $ 453
Adjustments to reconcile net income to cash provided by (used in) operating activities: |  |
Depreciation and amortization | 290 | 244
Unrealized/realized (gain) loss on fuel derivative instruments | 88 | 11
Deferred income taxes | 26 | 19
Changes in certain assets and liabilities: |  |
Accounts and other receivables | (21) | (130)
Other assets | 4 | 13
Accounts payable and accrued liabilities | 313 | 177
Air traffic liability | 685 | 717
Cash collateral provided to derivative counterparties | (231) | (17)
Other, net | (49) | (35)
Net cash provided by operating activities | 1,616 | 1,452
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Capital expenditures | (438) | (573)
Assets constructed for others | (11) | (22)
Purchases of short-term investments | (256) | (316)
Proceeds from sales of short-term and other investments | 530 | 609
Net cash used in investing activities | (175) | (302)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Proceeds from Employee stock plans | 11 | 13
Proceeds from termination of interest rate derivative instruments | 0 | 12
Reimbursement for assets constructed for others | 10 | 2
Payments of long-term debt and capital lease obligations | (56) | (51)
Payments of cash dividends | (96) | (81)
Repayment of construction obligation | (2) | (2)
Repurchase of common stock | (500) | (300)
Other, net | (3) | 0
Net cash used in financing activities | (636) | (407)
NET CHANGE IN CASH AND CASH EQUIVALENTS | 805 | 743
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD | 1,583 | 1,282
CASH AND CASH EQUIVALENTS AT END OF PERIOD | 2,388 | 2,025
CASH PAYMENTS FOR: |  |
Interest, net of amount capitalized | 27 | 32
Income taxes | 73 | 111
SUPPLEMENTAL DISCLOSURE OF NONCASH TRANSACTIONS |  |
Flight equipment under capital leases | 169 | 41
Assets constructed for others | $ 60 | $ 43

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- Definition The cash inflow associated with the amount received from the stock plan during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash outflow associated with security instruments that either represent a creditor or an ownership relationship with the holder of the investment security with a maturity of beyond one year or normal operating cycle, if longer. Includes repayments of (a) debt, (b) capital lease obligations, (c) mandatory redeemable capital securities, and (d) any combination of (a), (b), or (c). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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