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Interest Rate Derivatives (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Other Current Assets |  |  |
Derivative [Line Items] |  |  |
Derivative Asset, Net |  | $ 228 | $ 49
Other Current Assets | Fair Value, Measured on a Recurring Basis |  |  |
Derivative [Line Items] |  |  |
Derivative Asset, Gross |  | 479 | 99
Netting | [1] | 254 | 53
Derivative Asset, Net |  | 225 | 46
Other Current Assets | Level 1 | Fair Value, Measured on a Recurring Basis |  |  |
Derivative [Line Items] |  |  |
Derivative Asset, Gross |  | 50 | 2
Other Current Assets | Level 2 | Fair Value, Measured on a Recurring Basis |  |  |
Derivative [Line Items] |  |  |
Derivative Asset, Gross |  | 323 | 76
Other Current Assets | Level 3 | Fair Value, Measured on a Recurring Basis |  |  |
Derivative [Line Items] |  |  |
Derivative Asset, Gross |  | 106 | 21
Interest rate derivatives |  |  |
Derivative [Line Items] |  |  |
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net |  | 6 |
Interest rate derivatives | Other Current Assets | Fair Value, Measured on a Recurring Basis | Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Derivative Asset, Gross |  | 4 | 0
Netting | [1] | 0 | 0
Derivative Asset, Net |  | 4 | 0
Interest rate derivatives | Other Current Assets | Level 1 | Fair Value, Measured on a Recurring Basis | Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Derivative Asset, Gross |  | 0 | 0
Interest rate derivatives | Other Current Assets | Level 2 | Fair Value, Measured on a Recurring Basis | Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Derivative Asset, Gross |  | 4 | 0
Interest rate derivatives | Other Current Assets | Level 3 | Fair Value, Measured on a Recurring Basis | Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Derivative Asset, Gross |  | $ 0 | $ 0
[1] | Xcel Energy nets derivative instruments and related collateral on its consolidated balance sheets when supported by a legally enforceable master netting agreement, and all derivative instruments and related collateral amounts were subject to master netting agreements at Sept. 30, 2021 and Dec. 31, 2020. At both Sept. 30, 2021 and Dec. 31, 2020, derivative assets and liabilities include $15 million of obligations to return cash collateral. At Sept. 30, 2021 and Dec. 31, 2020, derivative assets and liabilities include rights to reclaim cash collateral of $42 million and $6 million, respectively. Counterparty netting amounts presented exclude settlement receivables and payables and non-derivative amounts that may be subject to the same master netting agreements.

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