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Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 2023
Fair Value Disclosures [Abstract]  
Financial Assets and Liabilities Carried at Fair Value
A summary of financial assets that are measured at fair value on a recurring basis were as follows ($ in millions):
BalanceQuoted Prices in Active Market (Level 1)Significant Other Observable Inputs (Level 2)Significant Unobservable Inputs (Level 3)
June 30, 2023December 31, 2022June 30, 2023December 31, 2022June 30, 2023December 31, 2022June 30, 2023December 31, 2022
Assets:
Available-for-sale debt securities$7 $11 $— $— $7 $11 $— $— 
Investment in equity securities438 315 142 16 — — — — 
Cross-currency swap derivative contracts497 653 — — 497 653 — — 
Carrying Amounts and Fair Values of Financial Instruments
The carrying amounts and fair values of the Company’s other financial instruments were as follows ($ in millions):
 June 30, 2023December 31, 2022
 Carrying AmountFair ValueCarrying AmountFair Value
Debt obligations:
Notes payable and current portion of long-term debt$1,590 $1,571 $591 $584 
Long-term debt18,285 15,520 19,086 16,079