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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Notes) | 12 Months Ended
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Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] |
|  |  |  | Additions (Deductions) |  |  |  |
|  | Balance at |  | Charged to |  | Charged to |  | Other |  | Balance at
|  | Beginning of |  | Costs and |  | Other |  | Additions |  | End of
|  | Year |  | Expense |  | Accounts |  | (Deductions) |  | Year
Reserves and allowances deducted |  |  |  |  |  |  |  |  |  |
from asset accounts: |  |  |  |  |  |  |  |  |  |
Valuation allowance for deferred tax assets |  |  |  |  |  |  |  |  |  |
Year Ended December 31, 2019 |  | $ | 4,507 |  |  | $ | 50 |  | a | $ | 19 |  | b | $ | — |  |  | $ | 4,576 |
Year Ended December 31, 2018 |  | 4,575 |  |  | (345 | ) | c | 8 |  | b | 269 |  | d | 4,507 |
Year Ended December 31, 2017 |  | 6,058 |  |  | (1,484 | ) | e | 1 |  | b | — |  |  | 4,575 |
Reserves for non-income taxes: |  |  |  |  |  |  |  |  |  |
Year Ended December 31, 2019 |  | $ | 62 |  |  | $ | — |  |  | $ | — |  |  | $ | (4 | ) | f | $ | 58 |
Year Ended December 31, 2018 |  | 58 |  |  | 7 |  |  | (1 | ) |  | (2 | ) | f | 62 |
Year Ended December 31, 2017 |  | 64 |  |  | (2 | ) |  | — |  |  | (4 | ) | f | 58 |
a. | Primarily relates to a $208 million increase in United States (U.S.) federal deferred tax assets for which no benefit is expected to be realized, partly offset by a $98 million decrease in U.S. foreign tax credits associated with expirations and prior year adjustments, and a $44 million decrease in U.S. federal and state net operating loss carryforwards.
b. | Relates to a valuation allowance for tax benefits primarily associated with actuarial losses for U.S. defined benefit plans included in other comprehensive (loss) income.
c. | Primarily relates to a $315 million decrease in U.S. foreign tax credits associated with expirations and 2017 U.S. tax reform adjustments, and a decrease of $45 million in U.S. federal net operating losses associated with 2018 usage and 2017 U.S tax reform.
d. | Primarily relates to a $244 million increase in foreign net operating losses for which no benefit is expected to be realized resulting from PT Freeport Indonesia’s acquisition of PT Rio Tinto Indonesia.
e. | Relates to a $1.1 billion decrease associated with a reduction in the corporate income tax rate applicable to U.S. federal deferred tax assets and $371 million for the reversal of valuation allowances on U.S. federal alternative minimum tax credits.
f. Represents amounts paid or adjustments to reserves based on revised estimates.

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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