Annual report pursuant to Section 13 and 15(d)

NET CHANGE IN OPERATING ASSETS AND LIABILITIES

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NET CHANGE IN OPERATING ASSETS AND LIABILITIES
 12 Months Ended
Dec. 31, 2020
NET CHANGE IN OPERATING ASSETS AND LIABILITIES DISCLOSURE [Abstract]  
NET CHANGE IN OPERATING ASSETS AND LIABILITIES NET CHANGE IN OPERATING ASSETS AND LIABILITIES
Net cash provided by (used in) operating activities attributable to the net change in operating assets and liabilities was composed of the following (in millions):
Year Ended December 31, 2020 2019 2018
(Increase) decrease in trade accounts receivable1
$ 882  $ (158) $ 27 
(Increase) decrease in inventories 99  (183) (203)
(Increase) decrease in prepaid expenses and other assets 78  (87) (221)
Increase (decrease) in accounts payable and accrued expenses2
(860) 1,318  (251)
Increase (decrease) in accrued income taxes (16) 96  (17)
Increase (decrease) in other liabilities3
507  (620) (575)
Net change in operating assets and liabilities $ 690  $ 366  $ (1,240)
1 The decrease in trade accounts receivable in 2020 was primarily due to the impacts of the COVID-19 pandemic and the start of a trade accounts receivable factoring program. Refer to Note 1 for additional information on the factoring program.
2 The decrease in accounts payable and accrued expenses in 2020 was primarily driven by the impacts of the COVID-19 pandemic and incentive payments related to prior year exceeding current year incentive accruals. The increase in accounts payable and accrued expenses in 2019 was primarily due to extending payment terms with our suppliers.
3 The increase in other liabilities in 2020 was primarily due to the increase in tax reserves related to IRS litigation. Refer to Note 11.