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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
OPERATING ACTIVITIES |  |  |
Net income |  | $ 611 | $ 34
Adjustments to reconcile net income to net cash used in operating activities: |  |  |
Provision for credit losses |  | (140) | 600
Net change in loans held for sale |  | (622) | (860)
Depreciation, amortization and accretion |  | 152 | 204
Deferred income taxes |  | 80 | (134)
Share-based compensation |  | 22 | 21
Net gain on sale of debt securities |  | (3) | 0
Increase in other assets |  | (773) | (1,022)
Decrease in other liabilities |  | (17) | (170)
Net cash used in operating activities |  | (690) | (1,327)
Investment securities: |  |  |
Purchases of debt securities available for sale |  | (4,256) | (2,102)
Proceeds from maturities and paydowns of debt securities available for sale |  | 2,281 | 1,010
Proceeds from sales of debt securities available for sale |  | 54 | 0
Proceeds from maturities and paydowns of debt securities held to maturity |  | 241 | 131
Net (increase) decrease in interest-bearing deposits in banks |  | (2) | 17
Acquisitions, net of cash acquired |  | 0 | (3)
Net decrease (increase) in loans and leases |  | 1,042 | (7,630)
Capital expenditures, net |  | (10) | (16)
Purchase of bank-owned life insurance |  | (375) | 0
Other |  | (47) | (175)
Net cash used in investing activities |  | (1,072) | (8,768)
FINANCING ACTIVITIES |  |  |
Net increase in deposits |  | 4,185 | 8,162
Net (decrease) increase in short-term borrowed funds |  | (176) | 780
Proceeds from issuance of long-term borrowed funds |  | 0 | 6,800
Repayments of long-term borrowed funds |  | (4) | (4,500)
Treasury stock purchased |  | (95) | (270)
Dividends paid to common stockholders |  | (167) | (168)
Dividends paid to preferred stockholders |  | (32) | (23)
Premium paid to exchange subordinated debt |  | (1) | 0
Payments of employee tax withholding for share-based compensation |  | (21) | (14)
Net cash provided by financing activities |  | 3,689 | 10,767
(Decrease) increase in cash and cash equivalents | [1] | 1,927 | 672
Cash and cash equivalents at beginning of period | [1] | 12,733 | 3,386
Cash and cash equivalents at end of period | [1] | $ 14,660 | $ 4,058
[1] | Cash and cash equivalents includes cash and due from banks and interest-bearing cash and due from banks as reflected on the Consolidated Balance Sheets.

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- Definition The net cash inflow or outflow in Interest-bearing Deposits by banks in other financial institutions for relatively short periods of time including, for example, certificates of deposits. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3098-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121551529&loc=d3e60009-112784 + Details
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- Definition The net cash inflow or outflow for borrowing having initial term of repayment within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 + Details
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- Definition Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26853-111562 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3151-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
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