Leases (Operating Lease Maturities) (Details) $ in Millions	Dec. 31, 2021 USD ($)
Lessee, Operating Lease, Liability, Payment, Due
2022	$ 225
2023	212
2024	185
2025	156
2026	136
Thereafter	594
Total operating lease payments	1,508
Less: present value discount	(247)
Total operating lease liabilities	1,261
Duke Energy Carolinas
Lessee, Operating Lease, Liability, Payment, Due
2022	24
2023	21
2024	14
2025	10
2026	10
Thereafter	42
Total operating lease payments	121
Less: present value discount	(21)
Total operating lease liabilities	100
Progress Energy
Lessee, Operating Lease, Liability, Payment, Due
2022	118
2023	118
2024	110
2025	96
2026	92
Thereafter	290
Total operating lease payments	824
Less: present value discount	(124)
Total operating lease liabilities	700
Duke Energy Progress
Lessee, Operating Lease, Liability, Payment, Due
2022	63
2023	64
2024	56
2025	42
2026	38
Thereafter	220
Total operating lease payments	483
Less: present value discount	(83)
Total operating lease liabilities	400
Duke Energy Florida
Lessee, Operating Lease, Liability, Payment, Due
2022	55
2023	54
2024	54
2025	54
2026	54
Thereafter	70
Total operating lease payments	341
Less: present value discount	(41)
Total operating lease liabilities	300
Duke Energy Ohio
Lessee, Operating Lease, Liability, Payment, Due
2022	2
2023	2
2024	2
2025	2
2026	2
Thereafter	16
Total operating lease payments	26
Less: present value discount	(7)
Total operating lease liabilities	19
Duke Energy Indiana
Lessee, Operating Lease, Liability, Payment, Due
2022	6
2023	6
2024	4
2025	4
2026	4
Thereafter	50
Total operating lease payments	74
Less: present value discount	(20)
Total operating lease liabilities	54
Piedmont
Lessee, Operating Lease, Liability, Payment, Due
2022	5
2023	5
2024	5
2025	5
Total operating lease payments	20
Less: present value discount	(1)
Total operating lease liabilities	$ 19

Amount of lessee's undiscounted obligation for lease payment for operating lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due after fifth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in third rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date.

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Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977

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