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Consolidated Statements of Cash Flows
$ in Millions
 12 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Operating activities:      
Net income (loss) $ (4,099) $ (1,000) $ (2,472)
Adjustments to reconcile net loss to net cash provided by operations:      
Impairment of goodwill, long-lived assets and assets held for sale 6,546 1,778 5,621
Depreciation and amortization 1,557 1,722 1,842
Net change in operating assets and liabilities (2,188) (896) (1,823)
Deferred income taxes, net and uncertain tax positions (696) (985) (837)
Stock-based compensation 129 119 155
Other items 100 28 (135)
Research and development in process 80 0 114
Net loss (gain) from investments and from sale of long lived assets (213) (18) (19)
Net cash provided by operating activities 1,216 748 2,446
Investing activities:      
Beneficial interest collected in exchange for securitized trade receivables 1,405 1,487 1,735
Proceeds from sales of long-lived assets and investments 67 343 890
Purchases of property, plant and equipment (578) (525) (651)
Purchases of investments and other assets (55) (8) (119)
Other investing activities 24 58 11
Net cash provided by investing activities 863 1,355 1,866
Financing activities:      
Repayment of senior notes and loans and other long-term liabilities (1,871) (3,944) (7,446)
Proceeds from senior notes and loans, net of issuance costs 0 2,083 4,434
Proceeds from short term debt 550 500 0
Repayment of short term debt (559) (502) (260)
Other financing activities (5) (11) (57)
Tax withholding payments made on shares and dividends 0 (52) (22)
Net cash used in financing activities (1,885) (1,926) (3,351)
Translation adjustment on cash and cash equivalents 8 16 (142)
Net change in cash and cash equivalents 202 193 819
Balance of cash and cash equivalents at beginning of year 1,975 1,782 963
Balance of cash and cash equivalents at end of year 2,177 1,975 1,782
Non-cash financing and investing activities:      
Beneficial interest obtained in exchange for securitized trade receivables 1,397 1,511 1,716
Conversion of mandatory convertible preferred shares into ordinary shares 0 0 3,880
Cash paid during the year for:      
Interest 846 840 815
Income taxes, net of refunds 709 552 420
Net change in operating assets and liabilities:      
Other current assets (1,473) (1,416) (1,437)
Trade payables, accrued expenses, employee-related obligations and other liabilities (463) 643 (500)
Trade receivables net of sales reserves and allowances (293) (394) 88
Inventories 41 271 26
Net Change In Items Comprising Supplemental Disclosure Of Cash Flow Information $ (2,188) $ (896) $ (1,823)