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Other Comprehensive Income | 12 Months Ended
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Dec. 31, 2018
Stockholders' Equity Note [Abstract] |
Comprehensive Income (Loss) Note [Text Block] | 13. Other Comprehensive Income Changes in accumulated other comprehensive (loss), net of tax, for the years ended Dec. 31:
|  | 2018
(Millions of Dollars) |  | Gains and Losses on Cash Flow Hedges |  | Defined Benefit Pension and Postretirement Items |  | Total
Accumulated other comprehensive loss at Jan. 1 |  | $ | (58 | ) |  | $ | (67 | ) |  | $ | (125 | )
Other comprehensive loss before reclassifications (net of taxes of $(2) and $(2), respectively) |  | (5 | ) |  | (6 | ) |  | (11 | )
Losses reclassified from net accumulated other comprehensive loss: |  |  |  |  |  |
Interest rate derivatives (net of taxes of $1 and $0, respectively) |  | 3 |  | (a) | — |  |  | 3 |
Amortization of net actuarial loss (net of taxes of $0 and $3, respectively) |  | — |  |  | 9 |  | (b) | 9 |
Net current period other comprehensive income (loss) |  | (2 | ) |  | 3 |  |  | 1 |
Accumulated other comprehensive loss at Dec. 31 |  | $ | (60 | ) |  | $ | (64 | ) |  | $ | (124 | )
|  | 2017
(Millions of Dollars) |  | Gains and Losses on Cash Flow Hedges |  | Defined Benefit Pension and Postretirement Items |  | Total
Accumulated other comprehensive loss at Jan. 1 |  | $ | (51 | ) |  | $ | (59 | ) |  | $ | (110 | )
Other comprehensive loss before reclassifications (net of taxes of $0 and $(2), respectively) |  | — |  |  | (3 | ) |  | (3 | )
Losses reclassified from net accumulated other comprehensive loss: |  |  |  |  |  |
Interest rate derivatives (net of taxes of $2 and $0, respectively) |  | 3 |  | (a) | — |  |  | 3 |
Amortization of net actuarial loss (net of taxes of $0 and $5, respectively) |  | — |  |  | 7 |  | (b) | $ | 7 |
Net current period other comprehensive income |  | 3 |  |  | 4 |  |  | 7 |
Adoption of ASU No. 2018-02 (c) |  | (10 | ) |  | (12 | ) |  | (22 | )
Accumulated other comprehensive loss at Dec. 31 |  | $ | (58 | ) |  | $ | (67 | ) |  | $ | (125 | )
(a) | Included in interest charges.
(b) | Included in the computation of net periodic pension and postretirement benefit costs.
(c) | In 2017, Xcel Energy implemented ASU No. 2018-02 related to the TCJA, which resulted in reclassification of certain credit balances within net accumulated other comprehensive loss to retained earnings.

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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- References No definition available. + Details
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