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RECENT ACCOUNTING PRONOUNCEMENTS - Cash Flow Impact (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Net Income | $ 1,485 | $ 1,384 | $ 2,830 | $ 2,550
Deferred tax (benefit) expense |  |  | 142 | 180
Other assets |  |  | 1,345 | 420
Accounts payable |  |  | (260) | (530)
Accrued wages and withholdings |  |  | (9) | (13)
Other liabilities |  |  | 22 | (458)
Net cash from operating activities |  |  | 7,200 | 2,621
Purchases of marketable securities |  |  | (446) | (1,082)
Net cash used in investing activities |  |  | (2,820) | (2,025)
Net decrease in cash, cash equivalents and restricted cash |  |  | 722 | 70
Beginning of period |  |  | 3,769 | 3,921
End of period | $ 4,491 | 3,991 | $ 4,491 | 3,991
Previously Reported |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Net Income |  | 1,384 |  | 2,542
Deferred tax (benefit) expense |  |  |  | 175
Other assets |  |  |  | 440
Accounts payable |  |  |  | (534)
Accrued wages and withholdings |  |  |  | (18)
Other liabilities |  |  |  | (456)
Net cash from operating activities |  |  |  | 2,621
Purchases of marketable securities |  |  |  | (1,084)
Net cash used in investing activities |  |  |  | (2,027)
Net decrease in cash, cash equivalents and restricted cash |  |  |  | 68
Beginning of period |  |  |  | 3,476
End of period |  | 3,544 |  | 3,544
ASU 2014-09 | Restatement |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Net Income |  | 0 |  | 8
Deferred tax (benefit) expense |  |  |  | 5
Other assets |  |  |  | (20)
Accounts payable |  |  |  | 4
Accrued wages and withholdings |  |  |  | 5
Other liabilities |  |  |  | (2)
Net cash from operating activities |  |  |  | 0
Net cash used in investing activities |  |  |  | 0
Net decrease in cash, cash equivalents and restricted cash |  |  |  | 0
Beginning of period |  |  |  | 0
End of period |  | 0 |  | 0
ASU 2016-18 | Restatement |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Net Income |  |  |  | 0
Net cash from operating activities |  |  |  | 0
Purchases of marketable securities |  |  |  | 2
Net cash used in investing activities |  |  |  | 2
Net decrease in cash, cash equivalents and restricted cash |  |  |  | 2
Beginning of period |  |  |  | 445
End of period |  | $ 447 |  | $ 447

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- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3044-108585 + Details
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- Definition Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 + Details
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