Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring and Nonrecurring

The following tables provide the valuation hierarchy classification of assets and liabilities that are carried at fair value and measured on a recurring basis in our Consolidated Balance Sheet:

	December 31, 2022
(dollars in millions)	Total		Level 1		Level 2		Level 3
Recurring fair value measurements:
Marketable securities held in trusts	$	774	$	713	$	61	$	—
Derivative assets	84		—		84		—
Derivative liabilities	386		—		386		—

	December 31, 2021
(dollars in millions)	Total		Level 1		Level 2		Level 3
Recurring fair value measurements:
Marketable securities held in trusts	$	965	$	890	$	75	$	—
Derivative assets	70		—		70		—
Derivative liabilities	213		—		213		—

Fair Value, by Balance Sheet Grouping

The following table provides carrying amounts and fair values of financial instruments that are not carried at fair value in our Consolidated Balance Sheet at December 31:

	2022				2021
(dollars in millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Customer financing notes receivables	$	169	$	161	$	195	$	192
Long-term debt (excluding finance leases)	31,201		28,049		31,250		35,828

The following table provides the valuation hierarchy classification of assets and liabilities that are not carried at fair value in our Consolidated Balance Sheet at December 31:

	December 31, 2022
(dollars in millions)	Total		Level 1		Level 2		Level 3
Customer financing notes receivables	$	161	$	—	$	161	$	—
Long-term debt (excluding finance leases)	28,049		—		28,003		46

	December 31, 2021
(dollars in millions)	Total		Level 1		Level 2		Level 3
Customer financing notes receivables	$	192	$	—	$	192	$	—
Long-term debt (excluding finance leases)	35,828		—		35,778		50