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Note 18 - Deferred Tax Assets and Liabilities Significant Components (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Deferred tax assets    
Pension and postretirement obligations $ 25 $ 39
Restructuring programs 2 2
Leasing 4 1
Foreign tax credit 358 355
Inventories 9 8
Investment tax credit 42 46
Employee deferred compensation 26 24
Depreciation 36 41
Research and development costs 40 56
Tax loss carryforwards 480 325
Other deferred revenue 2 2
Other 89 86
Total deferred tax assets 1,113 985
Deferred tax liabilities    
Goodwill/intangibles 10 11
Unremitted foreign earnings 22 19
Total deferred tax liabilities 32 30
Net deferred tax assets before valuation allowance 1,081 955
Valuation allowance 1,112 821
Net deferred tax liabilities $ (31)  
Net deferred tax assets   $ 134