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Other Comprehensive Income (Loss) | 9 Months Ended
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Sep. 30, 2022
Stockholders' Equity Note [Abstract] |
Other Comprehensive Income (Loss) | Changes in accumulated other comprehensive loss, net of tax, for the three and nine months ended Sept. 30, 2022 and 2021:
|  | Three Months Ended Sept. 30, 2022 |  | Three Months Ended Sept. 30, 2021
(Millions of Dollars) |  | Gains and Losses on Cash Flow Hedges |  | Defined Benefit Pension and Postretirement Items |  | Total |  | Gains and Losses on Cash Flow Hedges |  | Defined Benefit Pension and Postretirement Items |  | Total
Accumulated other comprehensive loss at July 1 |  | $ | (57) |  |  | $ | (46) |  |  | $ | (103) |  |  | $ | (80) |  |  | $ | (55) |  |  | $ | (135) |
Other comprehensive gain before reclassifications |  | — |  |  | 10 |  |  | 10 |  |  | 3 |  |  | — |  |  | 3 |
Losses reclassified from net accumulated other comprehensive loss: |  |  |  |  |  |  |  |  |  |  |  |
Interest rate derivatives (a) | 1 |  |  | — |  |  | 1 |  |  | 2 |  |  | — |  |  | 2 |
Amortization of net actuarial loss (b) |  | — |  |  | 1 |  |  | 1 |  |  | — |  |  | 4 |  |  | 4 |
Net current period other comprehensive income |  | 1 |  |  | 11 |  |  | 12 |  |  | 5 |  |  | 4 |  |  | 9 |
Accumulated other comprehensive loss at Sept. 30 |  | $ | (56) |  |  | $ | (35) |  |  | $ | (91) |  |  | $ | (75) |  |  | $ | (51) |  |  | $ | (126) |
|  | Nine Months Ended Sept. 30, 2022 |  | Nine Months Ended Sept. 30, 2021
(Millions of Dollars) |  | Gains and Losses on Cash Flow Hedges |  | Defined Benefit Pension and Postretirement Items |  | Total |  | Gains and Losses on Cash Flow Hedges |  | Defined Benefit Pension and Postretirement Items |  | Total
Accumulated other comprehensive loss at Jan. 1 |  | $ | (75) |  |  | $ | (48) |  |  | $ | (123) |  |  | $ | (85) |  |  | $ | (56) |  |  | $ | (141) |
Other comprehensive gain before reclassifications |  | 15 |  |  | 11 |  |  | 26 |  |  | 4 |  |  | — |  |  | 4 |
Losses reclassified from net accumulated other comprehensive loss: |  |  |  |  |  |  |  |  |  |  |  |
Interest rate derivatives (a) |  | 4 |  |  | — |  |  | 4 |  |  | 6 |  |  | — |  |  | 6 |
Amortization of net actuarial loss (b) |  | — |  |  | 2 |  |  | 2 |  |  | — |  |  | 5 |  |  | 5 |
Net current period other comprehensive income |  | 19 |  |  | 13 |  |  | 32 |  |  | 10 |  |  | 5 |  |  | 15 |
Accumulated other comprehensive loss at Sept. 30 |  | $ | (56) |  |  | $ | (35) |  |  | $ | (91) |  |  | $ | (75) |  |  | $ | (51) |  |  | $ | (126) |
(a)Included in interest charges.

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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 https://asc.fasb.org/topic&trid=2134417 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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