Leases - NPC - Schedule of Lease Maturity (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Operating
2023	$ 158
2024	126
2025	101
2026	78
2027	53
Thereafter	189
Total undiscounted lease payments	705
Less - amounts representing interest	(100)
Operating leases	605	$ 577
Finance
2023	63
2024	62
2025	61
2026	60
2027	56
Thereafter	559
Total undiscounted lease payments	861
Less - amounts representing interest	(429)
Finance leases	432	463
Total
2023	221
2024	188
2025	162
2026	138
2027	109
Thereafter	748
Total undiscounted lease payments	1,566
Less - amounts representing interest	(529)
Total lease liabilities	1,037	1,040
NPC
Operating
2023	2
2024	3
2025	3
2026	3
2027	2
Thereafter	0
Total undiscounted lease payments	13
Less - amounts representing interest	(2)
Operating leases	11	13
Finance
2023	44
2024	44
2025	43
2026	44
2027	42
Thereafter	414
Total undiscounted lease payments	631
Less - amounts representing interest	(318)
Finance leases	313	336
Total
2023	46
2024	47
2025	46
2026	47
2027	44
Thereafter	414
Total undiscounted lease payments	644
Less - amounts representing interest	(320)
Total lease liabilities	$ 324	$ 349

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