LEASES (Tables)

12 Months Ended

Mar. 31, 2024

LEASES

Schedule of components of lease expense

					Three Months
					Ended		Year Ended
	Year Ended March 31,				March 31,		December 31,
(Dollars in millions)	2024		2023		2022		2021
Finance lease costs	$	112	$	85	$	21	$	69
Operating lease costs		388		434		111		354
Short-term lease costs		4		7		4		7
Variable lease costs		135		108		16		73
Sublease income		(11)		(9)		(1)		(5)
Total lease costs	$	629	$	625	$	150	$	498

Schedule of supplemental information relating to the cash flows arising from lease transactions

					Three Months
					Ended		Year Ended
	Year Ended March 31,				March 31,		December 31,
(Dollars in millions)	2024		2023		2022		2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflows for finance leases	$	14	$	5	$	1	$	3
Financing cash outflows for finance leases		116		83		20		70
Operating cash outflows for operating leases		387		417		118		327
Right-of-use assets obtained in exchange for new finance lease liabilities		212		111		19		86
Right-of-use assets obtained in exchange for new operating lease liabilities		291		175		67		562

Schedule of weighted-average lease terms and discount rates

	At March 31,
	2024		2023
Finance leases
Weighted-average remaining lease term	3.8	years	3.5	years
Weighted-average discount rate	5.58	%	3.36	%
Operating leases
Weighted-average remaining lease term	4.8	years	4.7	years
Weighted-average discount rate	5.15	%	4.38	%

Schedule of maturities of the finance leases liabilities

	Year Ending March 31,												Imputed
(Dollars in millions)	2025		2026		2027		2028		2029		Thereafter		Interest*		Total
Finance leases	$	121	$	102	$	63	$	38	$	31	$	—	$	(67)	$	289
Operating leases	$	337	$	281	$	169	$	97	$	70	$	143	$	(191)	$	907

*      Imputed interest represents the difference between undiscounted cash flows and discounted cash flows.

Schedule of maturities of the operating leases liabilities

	Year Ending March 31,												Imputed
(Dollars in millions)	2025		2026		2027		2028		2029		Thereafter		Interest*		Total
Finance leases	$	121	$	102	$	63	$	38	$	31	$	—	$	(67)	$	289
Operating leases	$	337	$	281	$	169	$	97	$	70	$	143	$	(191)	$	907

*      Imputed interest represents the difference between undiscounted cash flows and discounted cash flows.

Schedule of finance leases recognized in the Consolidated Balance Sheet

	At March 31,
(Dollars in millions)	2024		2023
Right-of-use assets – Property and equipment	$	309	$	245
Lease liabilities:
Current		95		82
Noncurrent		193		160