Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 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.

	March 31, 2023						December 31, 2022
(Dollars in millions)	Level 1		Level 2		Total		Level 1		Level 2		Total
Fixed Income Mutual Funds	$	77	$	—	$	77	$	89	$	—	$	89
Corporate Bonds	—		49		49		—		49		49
Time Deposits	—		100		100		—		—		—
Government Securities	—		18		18		—		58		58
Total investments at fair value	$	77	$	167	$	244	$	89	$	107	$	196
Total investments at amortized cost					$	247					$	201

Schedule of Investment Maturities

These investments have the following maturities:

(Dollars in millions)	March 31, 2023		December 31, 2022
Less than 1 year	$	178	$	129
1 - 5 years	24		24
5 - 10 years	9		10
Greater than 10 years	33		33
Total investments at fair value	$	244	$	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)	March 31, 2023		December 31, 2022
Long-term Debt (Including Current Maturities):
Fair Value	$	16,592	$	16,135
Carrying Value	17,922		18,047