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Fair Value Of Financial Instruments
9 Months Ended
Sep. 30, 2023
Fair Value Of Financial Instruments [Abstract]  
Fair Value Of Financial Instruments (7) Fair Value of Financial Instruments:

The following table summarizes the carrying amounts and estimated fair values for total long-term debt at September 30, 2023 and December 31, 2022. For the other financial instruments including cash, short-term investments, accounts receivable, accounts payable and other current liabilities, the carrying amounts approximate fair value due to the relatively short maturities of those instruments.

The fair value of our total long-term debt is estimated based upon quoted market prices at the reporting date for those financial instruments.

September 30, 2023

December 31, 2022

($ in millions)

Carrying Amount

Fair Value

Carrying Amount

Fair Value

Total debt

$

11,235

$

9,977

$

8,963

$

8,079