v3.20.1

FAIR VALUE MEASUREMENTS - RECONCILIATION FOR ASSETS AND LIABILITIES MEASURE AT FAIR VALUE USING LEVEL 3 (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Total |  |
Balance at beginning of period | $ 176 | $ 193
Purchases | 443 | 338
Sales | (627) | (570)
Issuances | (2) |
Settlements | 43 | (20)
Transfers into Level 3 | 215 | 304
Transfers out of Level 3 | (88) | (55)
Balance at end of period | 342 | 234
Cost of goods sold |  |
Total |  |
Total gains and losses (realized/unrealized) included in cost of goods sold | 182 | 44
Readily Marketable Inventories |  |
Readily Marketable Inventories |  |
Balance at beginning of period | 231 | 246
Purchases | 678 | 699
Sales | (627) | (570)
Issuances | 0 |
Settlements | 0 | 0
Transfers into Level 3 | 271 | 276
Transfers out of Level 3 | (98) | (55)
Balance at end of period | 619 | 633
Total |  |
Changes in unrealized gains (losses) relating to Level 3 assets and liabilities | 13 | 6
Readily Marketable Inventories | Cost of goods sold |  |
Readily Marketable Inventories |  |
Total gains and losses (realized/unrealized) included in cost of goods sold | 164 | 37
Derivatives, Net |  |
Derivatives, Net |  |
Balance at beginning of period | (24) | (6)
Purchases | 1 | 0
Sales | 0 | 0
Issuances | (2) |
Settlements | (18) | 1
Transfers into Level 3 | 3 | 1
Transfers out of Level 3 | 10 | 0
Balance at end of period | (16) | (2)
Total |  |
Changes in unrealized gains (losses) relating to Level 3 assets and liabilities | 73 | 37
Derivatives, Net | Cost of goods sold |  |
Derivatives, Net |  |
Total gains and losses (realized/unrealized) included in cost of goods sold | 14 | 2
Trade Accounts Receivable/ Payable, Net |  |
Trade Accounts Receivable/ Payable, Net |  |
Balance at beginning of period | (31) | (47)
Purchases | (236) | (361)
Sales | 0 | 0
Issuances | 0 |
Settlements | 61 | (21)
Transfers into Level 3 | (59) | 27
Transfers out of Level 3 | 0 | 0
Balance at end of period | (261) | (397)
Total |  |
Changes in unrealized gains (losses) relating to Level 3 assets and liabilities | 5 | 5
Trade Accounts Receivable/ Payable, Net | Cost of goods sold |  |
Trade Accounts Receivable/ Payable, Net |  |
Total gains and losses (realized/unrealized) included in cost of goods sold | $ 4 | $ 5

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