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Employee Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2022
Retirement Benefits [Abstract]  
Schedule of Changes in Projected Benefit Obligations [Table Text Block]
A December 31 measurement date is used for all of the defined benefit and postretirement plans. The status of these plans as of December 31, 2022 and 2021 is summarized below (dollars in millions):
 December 31,
 Pension BenefitsOther Benefits
 2022202120222021
Change in benefit obligation:
Benefit obligation at beginning of year$256 $254 $75 $81 
Service cost17 18 3 3 
Interest cost6 4 2 2 
Participant contributions— — — — 
Amendments— — 2 (3)
Actuarial (gains) losses(50)(8)(20)(6)
Benefits paid(12)(12)(2)(2)
Foreign exchange translations and other adjustments(3)— — — 
Benefit obligation at end of year$214 $256 $60 $75 
Schedule of Changes in Fair Value of Plan Assets [Table Text Block]
 December 31,
 Pension BenefitsOther Benefits
 2022202120222021
Change in plan assets:
Fair value of plan assets at beginning of year$179 $157 $— $— 
Actual return on plan assets(30)15 — — 
Employer contributions21 19 2 2 
Participant contributions— — — — 
Benefits paid(12)(12)(2)(2)
Fair value of plan assets at end of year$158 $179 $— $— 
Funded status at end of year$(56)$(77)$(60)$(75)
Schedule of Net Funded Status [Table Text Block]
 December 31,
 Qualified Plans
Non-Qualified Plans(1)
Total
 202220212022202120222021
Aggregate fair value of plan assets$158 $179 $— $— $158 $179 
Aggregate projected benefit obligations142 166 72 90 214 256 
Over (under) funded$16 $13 $(72)$(90)$(56)$(77)
(1)For non-qualified plans, there are no required funding levels.
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
 December 31,
 Pension BenefitsOther Benefits
 2022202120222021
Amounts recognized in accumulated other comprehensive income (loss):
Net actuarial (gain) loss$40 $52 $(1)$20 
Net prior service cost (credit)— — (6)(9)
Total$40 $52 $(7)$11 
Schedule Of Projected Benefit Obligations In Excess Of Fair Value Of Plan Assets [Table Text Block]
The following table presents information for pension plans with a projected benefit obligation in excess of plan assets as of December 31, 2022 and 2021 (dollars in millions):
 20222021
Projected benefit obligation$73 $256 
Fair value of plan assets— 179 
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Table Text Block]
The following table presents information for pension plans with an accumulated benefit obligation in excess of plan assets as of December 31, 2022 and 2021 (dollars in millions):
20222021
Accumulated benefit obligation$66 $248 
Fair value of plan assets— 179 
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
The components of net periodic benefit cost, included in other operating expenses on the consolidated statements of income, and other changes in plan assets and benefit obligations recognized in other comprehensive income were as follows (dollars in millions):
  
Pension BenefitsOther Benefits
 202220212020202220212020
Net periodic benefit cost:
Service cost$17 $18 $14 $3 $3 $3 
Interest cost6 4 6 2 2 2 
Expected return on plan assets(12)(10)(9)— — — 
Amortization of net actuarial losses3 6 5 1 2 2 
Amortization of prior service cost (credit)— — — (2)(1)(1)
Settlements— — — — — — 
Net periodic benefit cost14 18 16 4 6 6 
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Net actuarial (gains) losses(9)(13)17 (20)(6)(8)
Amortization of net actuarial (losses)(3)(6)(5)(1)(2)(2)
Amortization of prior service (cost) credit— — — 2 1 1 
Settlements— — — — — — 
Prior service cost (credit)— — — 1 (3)— 
Foreign exchange translations and other adjustments— — — — — — 
Total recognized in other comprehensive income (loss)(12)(19)12 (18)(10)(9)
Total recognized in net periodic benefit cost and other comprehensive income (loss)$2 $(1)$28 $(14)$(4)$(3)
Schedule of Expected Benefit Payments [Table Text Block]
The following benefit payments, which reflect expected future service as appropriate, are expected to be paid (dollars in millions):
Pension BenefitsOther Benefits
2023$12 $2 
202415 3 
202516 3 
202617 3 
202717 4 
2028 – 2032
99 21 
Defined Benefit Plan, Assumptions [Table Text Block]
The weighted average assumptions used to determine the benefit obligation and net periodic benefit cost were as follows:
 Pension BenefitsOther Benefits
 202220212020202220212020
Benefit obligation
Discount rate5.00 %2.64 %2.22 %4.99 %2.76 %2.41 %
Rate of compensation increase4.96 %4.74 %4.69 %n/an/an/a
Net periodic benefit cost
Discount rate2.65 %2.21 %3.03 %2.76 %2.41 %3.17 %
Expected long-term rate of return on plan assets6.50 %6.50 %7.00 %n/an/an/a
Rate of compensation increase4.75 %4.71 %4.60 %n/an/an/a
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]
The assumed health care cost trend rates used in measuring the accumulated non-pension post-retirement benefit obligation were as follows:
 As of December 31,
 20222021
Health care cost trend rates assumed for next year7.00 %6.50 %
Ultimate cost trend rate4.50 %4.50 %
Year ultimate trend is reached20282026
Schedule of Allocation of Plan Assets [Table Text Block]
The fair values of the Company’s qualified pension plan assets as of December 31, 2022 and 2021 are summarized below (dollars in millions):
  
December 31, 2022
  Fair Value Measurement Using:
 TotalLevel 1Level 2Level 3
Mutual Funds(1)
$158 $158 $— $— 
Cash— — — — 
Total$158 $158 $— $— 
(1)Mutual funds were invested 25% in U.S. equity funds, 40% in U.S. fixed income funds, 16% in non-U.S. equity funds and 19% in other.
  
December 31, 2021
  Fair Value Measurement Using:
 TotalLevel 1Level 2Level 3
Mutual Funds(2)
$179 $179 $— $— 
Cash— — — — 
Total$179 $179 $— $— 
(2)Mutual funds were invested 27% in U.S. equity funds, 38% in U.S. fixed income funds, 18% in non-U.S. equity funds and 17% in other.