Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Schedule of Fair Value of Investment Assets

The Company's investment assets are carried at fair value on the consolidated balance sheets as summarized in the following table.

	September 30, 2023						December 31, 2022
(Dollars in millions)	Level 1		Level 2		Total		Level 1		Level 2		Total
Fixed Income Mutual Funds	$	78	$	—	$	78	$	89	$	—	$	89
Corporate Bonds	—		47		47		—		49		49
Government Securities	—		16		16		—		58		58
Total investments at fair value	$	78	$	63	$	141	$	89	$	107	$	196
Total investments at amortized cost					$	147					$	201

Schedule of Investment Maturities

These investments have the following maturities:

(Dollars in millions)	September 30, 2023		December 31, 2022
Less than 1 year	$	79	$	129
1 - 5 years	23		24
5 - 10 years	10		10
Greater than 10 years	29		33
Total investments at fair value	$	141	$	196

Schedule of Fair Value and Carrying Value of Long-Term Debt

The fair value and carrying value of the Company's long-term debt is as follows:

(Dollars in millions)	September 30, 2023		December 31, 2022
Long-term Debt (Including Current Maturities):
Fair Value	$	15,839	$	16,135
Carrying Value	18,462		18,047