Leases (Tables)

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Lease, Cost

The components of lease expense for the year ended December 31, 2020 were as follows:

	Year Ended December 31
(Dollars in millions)	2020		2019
Operating lease cost	$	24	$	24
Finance lease cost
Amortization of right-of-use assets	4		3
Interest on lease liabilities	2		2
Total finance lease cost	6		5
Short-term lease cost	1		—
Total lease cost	$	31	$	29

Other information related to leases for the year ended December 31, 2020 was as follows:

Supplemental Cash Flows Information	Year Ended December 31
(Dollars in millions)	2020		2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows used for operating leases	$	23	$	22
Operating cash flows used for finance leases	2		2
Financing cash flows used for finance leases	2		2
Right-of-use assets obtained in exchange for new lease obligations:
Operating leases	17		52
Finance leases	17		33

	As of December 31
(Lease term in years and discount rate)	2020		2019
Weighted-average remaining lease term
Operating Leases	7		8
Finance Leases	10		11
Weighted-average discount rate
Operating leases	3.4	%	3.6	%
Finance leases	4.95	%	4.9	%

Lessee, Operating Lease, Liability, Maturity

Future minimum lease payments under non-cancellable leases as of December 31, 2020 were as follows:

(Dollars in millions)	Operating Leases		Finance Leases
2021	$	21	$	6
2022	18		8
2023	16		8
2024	10		8
2025	8		4
Thereafter	27		32
Total lease payments	100		66
Less imputed interest	11		16
Total lease liabilities	$	89	$	50

Finance Lease, Liability, Maturity

Future minimum lease payments under non-cancellable leases as of December 31, 2020 were as follows:

(Dollars in millions)	Operating Leases		Finance Leases
2021	$	21	$	6
2022	18		8
2023	16		8
2024	10		8
2025	8		4
Thereafter	27		32
Total lease payments	100		66
Less imputed interest	11		16
Total lease liabilities	$	89	$	50

Lessee, Lease, Components of Financial Position

Lease obligations reported as of December 31, 2020 were as follows:

(Dollars in millions)	Operating Leases		Finance Leases
Other current liabilities	$	18	$	4
Lease liabilities - non current	71		46
Total lease liabilities	$	89	$	50