Leases (Tables)

12 Months Ended

Dec. 31, 2022

Leases [Abstract]

Lease, Cost [Table Text Block]

	Year Ended December 31,
(Dollars in millions)	2022		2021		2020
Lease Expense Components:
Operating Lease Expense	$	57	$	61	$	76
Short-term and Variable Lease Expense	90		65		63
Subtotal of Operating Lease Expense	$	147	$	126	$	139
Finance Lease Expense: Amortization of Assets and Interest on Lease Liabilities	18		16		15
Sublease Income	(3)		(4)		(6)
Total Lease Expense	$	162	$	138	$	148

Operating and Finance Lease Maturities [Table Text Block]

	Operating		Finance
(Dollars in millions)	Leases		Leases
Maturity of Lease Liabilities as of December 31, 2022:
2023	$	55	$	18
2024	38		16
2025	31		14
2026	24		13
2027	16		3
After 2027	91		1
Total Lease Payments	255		65
Less: Interest	(94)		(10)
Present Value of Lease Liabilities	$	161	$	55

Supplemental Lease Disclosures [Table Text Block]

	Years Ended
(Dollars in millions except years and percentages)	12/31/2022			12/31/2021			12/31/2020
Other Supplemental Information:
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflows from operating leases	$	80		$	89		$	101
Operating cash outflows from finance leases	$	5		$	5		$	5
Financing cash outflows from finance leases	$	16		$	13		$	9
Assets obtained in exchange for:
Operating leases	$	50		$	23		$	37
Finance leases	$	18		$	6		$	4
Weighted-average remaining lease term (years)
Operating leases	8.8			8.9			8.1
Finance leases	3.9			4.8			5.9
Weighted-average discount rate (percentages)
Operating leases	9.1		%	9.6		%	9.6		%
Finance leases	8.5		%	8.9		%	9.1		%