Leases - NPC - Schedule of Lease Maturity (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Operating
2024	$ 148
2025	122
2026	97
2027	71
2028	45
Thereafter	170
Total undiscounted lease payments	653
Less - amounts representing interest	(98)
Operating leases	555	$ 605
Finance
2024	63
2025	62
2026	62
2027	58
2028	52
Thereafter	512
Total undiscounted lease payments	809
Less - amounts representing interest	(396)
Finance leases	413	432
Total
2024	211
2025	184
2026	159
2027	129
2028	97
Thereafter	682
Total undiscounted lease payments	1,462
Less - amounts representing interest	(494)
Total lease liabilities	968	1,037
NPC
Operating
2024	3
2025	3
2026	3
2027	2
2028	0
Thereafter	0
Total undiscounted lease payments	11
Less - amounts representing interest	(2)
Operating leases	9	11
Finance
2024	45
2025	44
2026	44
2027	42
2028	39
Thereafter	377
Total undiscounted lease payments	591
Less - amounts representing interest	(293)
Finance leases	298	313
Total
2024	48
2025	47
2026	47
2027	44
2028	39
Thereafter	377
Total undiscounted lease payments	602
Less - amounts representing interest	(295)
Total lease liabilities	$ 307	$ 324

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-6

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-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479041/842-20-45-1

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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479041/842-20-45-1

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