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Consolidated Statements of Cash Flows - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Operating activities:    
Net income (loss) $ 306 $ 78
Adjustments to reconcile net income (loss) to net cash provided by operations:    
Depreciation and amortization 681 781
Impairment of long-lived assets and assets held for sale 354 1,120
Net change in operating assets and liabilities (1,679) (1,002)
Deferred income taxes – net and uncertain tax positions 5 (502)
Stock-based compensation 60 62
Net loss (gain) from investments and from sale of long lived assets 93 24
Other items (7) 17
Net cash provided by (used in) operating activities (187) 578
Investing activities:    
Beneficial interest collected in exchange for securitized accounts receivables 881 769
Purchases of property, plant and equipment (263) (259)
Proceeds from sale of business and long lived assets 254 45
Proceeds from sale of investments 153 9
Other investing activities (36) 1
Net cash provided by investing activities 989 565
Financing activities:    
Repayment of senior notes and loans and other long-term liabilities 0 (700)
Redemption of convertible senior notes (491) 0
Other financing activities (3) (3)
Net cash used in financing activities (494) (703)
Translation adjustment on cash and cash equivalents (49) (13)
Net change in cash and cash equivalents 259 427
Balance of cash and cash equivalents at beginning of period 2,177 1,975
Balance of cash and cash equivalents at end of period 2,436 2,402
Non-cash financing and investing activities:    
Beneficial interest obtained in exchange for securitized accounts receivables $ 878 $ 728