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Income Taxes (DTA and DTL) (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Deferred tax liabilities    
Intangibles $ 461 $ 439
Property, net 196 175
Right of use assets 265 238
Inventory Reserves 116 120
Other 252 215
Total deferred tax liabilities 1,290 1,187
Deferred tax assets    
U.S. general business credit carryforwards, including Energy Tax Credits 680 787
Lease liabilities 275 242
Pensions 114 66
Loss carryforwards 1,336 1,226
Postretirement obligations 49 145
Foreign tax credit carryforwards 25 39
Research and development capitalization 121 133
Employee payroll and benefits 118 96
Accrued expenses 96 93
Product warranty accrual 76 78
Receivable and inventory allowances 112 72
Other 646 574
Total deferred tax assets 3,648 3,551
Valuation allowances for deferred tax assets (214) (192)
Deferred tax assets, net of valuation allowances 3,434 3,359
Net deferred tax assets $ 2,144 $ 2,172