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Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2021
Income Tax Disclosure [Abstract]  
Schedule of Income before Income Tax Domestic and Foreign [Table Text Block] The sources of income (loss) from continuing operations before income taxes are:
(dollars in millions)202120202019
United States$3,498 $(2,762)$1,594 
Foreign1,433 409 2,558 
Income (loss) from continuing operations before income taxes$4,931 $(2,353)$4,152 
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] The income tax expense (benefit) for the years ended December 31 are as follows:
(dollars in millions)202120202019
Current:
United States:
Federal$387 $324 $(100)
State60 45 (58)
Foreign427 305 541 
874 674 383 
Future:
United States:
Federal(26)(264)121 
State41 258 56 
Foreign(103)(93)(139)
 (88)(99)38 
Income tax expense$786 $575 $421 
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Differences between effective income tax rates and the statutory U.S. federal income tax rate are as follows:
202120202019
(dollars in millions)AmountRateAmountRateAmountRate
Statutory U.S. federal income tax rate$1,036 21.0 %$(494)21.0 %$872 21.0 %
Tax on international activities(204)(4.1)27 (1.1)32 0.7 
Tax audit settlements— — — — (290)(7.0)
Tax charges related to Separation Transactions and Raytheon Merger(39)(0.8)416 (17.7)— — 
Disposals of businesses108 2.2 177 (7.5)— — 
U.S. research and development credit(172)(3.5)(142)6.1 (101)(2.4)
Goodwill impairment— — 668 (28.4)— — 
State income tax, net33 0.7 (56)2.4 16 0.4 
Foreign Derived Intangible Income (FDII)(121)(2.5)(83)3.5 (138)(3.3)
U.K. corporate tax rate enactment73 1.5 8 (0.4)— — 
Other72 1.4 54 (2.3)30 0.7 
Effective income tax rate$786 15.9 %$575 (24.4)%$421 10.1 %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] The tax effects of temporary differences and tax carryforwards which gave rise to future income tax benefits and payables at December 31, 2021 and 2020 are as follows:
(dollars in millions)20212020
Future income tax benefits:
Insurance and employee benefits$1,831 $3,004 
Inventory and contract balances756 822 
Warranty provisions248 220 
Other basis differences878 637 
Tax loss carryforwards251 196 
Tax credit carryforwards1,088 959 
Valuation allowances(825)(757)
Total future income tax benefits$4,227 $5,081 
Future income taxes payable:
Goodwill and Intangible assets$7,168 $7,786 
Fixed assets1,746 1,637 
Other basis differences323 151 
Total future income tax payable$9,237 $9,574 
Summary Of Tax Credit Carryforwards [Table Text Block] At December 31, 2021, tax credit carryforwards, principally state and foreign, and tax loss carryforwards, principally state and foreign, were as follows:
(dollars in millions)Tax Credit
Carryforwards		Tax Loss
Carryforwards
Expiration period:
2022-2026$65 $364 
2027-2031115 141 
2032-2041391 257 
Indefinite517 1,058 
Total$1,088 $1,820 
Summary Of Income Tax Contingencies [Table Text Block] A reconciliation of the beginning and ending amounts of unrecognized tax benefits and interest expense related to unrecognized tax benefits for the years ended December 31, 2021, 2020 and 2019 is as follows: 
(dollars in millions)202120202019
Balance at January 1$1,225 $1,347 $1,619 
Additions for tax positions related to the current year110 125 131 
Additions for tax positions of prior years282 323 73 
Reductions for tax positions of prior years(49)(83)(101)
Settlements(110)(48)(375)
Separation of Carrier and Otis— (439)— 
Balance at December 31$1,458 $1,225 $1,347 
Gross interest expense related to unrecognized tax benefits$39 $50 $57 
Total accrued interest balance at December 31165 141 249