Annual report pursuant to Section 13 and 15(d)

Schedule I - Condensed Financial Information of Registrant - Huntsman Corporation (Parent Only) Statements of Cash Flows (Details)

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Schedule I - Condensed Financial Information of Registrant - Huntsman Corporation (Parent Only) Statements of Cash Flows (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Operating Activities:                      
Net income                 $ 1,034 $ 562 $ 337
Equity in income of subsidiaries                 (42) (54) (55)
Stock-based compensation                 27 29 27
Net cash provided by operating activities                 253 897 1,207
Investing Activities:                      
Net cash provided by (used in) investing activities                 1,463 (260) (973)
Financing Activities:                      
Dividends paid to common stockholders $ (35) $ (36) $ (36) $ (37) $ (35) $ (38) $ (38) $ (39) (144) (150) (156)
Proceeds from issuance of common stock                 3 2 17
Repurchase of common stock                 (96) (208) (277)
Net cash used in financing activities                 (655) (450) (424)
Increase (decrease) in cash, cash equivalents and restricted cash                 1,068 185 (225)
Cash, cash equivalents and restricted cash from continuing operations at beginning of period       525       340 525 340 481
Cash and cash equivalents at end of period         525         525 340
Reportable Legal Entities [Member] | Parent Company [Member]                      
Operating Activities:                      
Net income                 1,034 562 337
Equity in income of subsidiaries                 (892) (401) (163)
Stock-based compensation                 1 1 1
Noncash interest income                 (2) (15) (21)
Changes in operating assets and liabilities                 (1) 13 19
Net cash provided by operating activities                 140 160 173
Investing Activities:                      
Repayments of loan by affiliate                 380 207 255
Net cash provided by (used in) investing activities                 380 207 255
Financing Activities:                      
Dividends paid to common stockholders                 (144) (150) (156)
Repurchase and cancellation of stock awards                 (8) (12) (30)
Proceeds from issuance of common stock                 3 2 17
Repurchase of common stock                 (96) (208) (277)
(Decrease) increase in payable to affiliates                 (273) 1 16
Net cash used in financing activities                 (518) (367) (430)
Increase (decrease) in cash, cash equivalents and restricted cash                 2 0 (2)
Cash, cash equivalents and restricted cash from continuing operations at beginning of period       $ 0       $ 0 0 0 2
Cash and cash equivalents at end of period $ 2       $ 0       $ 2 $ 0 $ 0