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Organization and Basis of Presentation (Policies) | 6 Months Ended
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Jun. 30, 2018
Basis of Presentation | Basis of Presentation The financial statements included herein have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (SEC) applicable to Quarterly Reports on Form 10-Q. Certain information and note disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (GAAP) have been condensed or omitted pursuant to such rules and regulations. These Condensed Consolidated Financial Statements and Notes to Condensed Consolidated Financial Statements (Notes) should be read in conjunction with, and update and supplement matters discussed in, the Annual Report on Form 10-K for the year ended December 31, 2017. The unaudited condensed consolidated financial information furnished herein reflects all adjustments which are, in the opinion of management, necessary to fairly state the results for the interim periods presented. All such adjustments are of a normal recurring nature. All significant intercompany accounts and transactions are eliminated in consolidation. The year-end Condensed Consolidated Balance Sheets were derived from the audited Consolidated Financial Statements included in the Annual Report on Form 10-K for the year ended December 31, 2017.
Cash, Cash Equivalents and Restricted Cash, Policy [Policy Text Block] | Cash, Cash Equivalents and Restricted Cash Cash equivalents consist of short-term, highly liquid investments with original maturities of three months or less. Restricted cash consists primarily of deposits received related to various construction projects at PSE&G. The following provides a reconciliation of cash, cash equivalents and restricted cash reported within the Condensed Consolidated Balance Sheets that sum to the total of the same such amounts for the beginning (December 31, 2017) and ending periods shown in the Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2018.
|  | PSE&G |  | Power |  | Other (A) |  | Consolidated |
|  | Millions |
| As of December 31, 2017 |  |  |  |  |  |  |  |
| Cash and Cash Equivalents | $ | 242 |  |  | $ | 32 |  |  | $ | 39 |  |  | $ | 313 |  |
| Restricted Cash in Other Current Assets | — |  |  | — |  |  | — |  |  | — |  |
| Restricted Cash in Other Noncurrent Assets | 2 |  |  | — |  |  | — |  |  | 2 |  |
| Cash, Cash Equivalents and Restricted Cash | $ | 244 |  |  | $ | 32 |  |  | $ | 39 |  |  | $ | 315 |  |
| As of June 30, 2018 |  |  |  |  |  |  |  |
| Cash and Cash Equivalents | $ | 20 |  |  | $ | 20 |  |  | $ | 55 |  |  | $ | 95 |  |
| Restricted Cash in Other Current Assets | 4 |  |  | — |  |  | — |  |  | 4 |  |
| Restricted Cash in Other Noncurrent Assets | 12 |  |  | — |  |  | — |  |  | 12 |  |
| Cash, Cash Equivalents and Restricted Cash | $ | 36 |  |  | $ | 20 |  |  | $ | 55 |  |  | $ | 111 |  |
(A) | Includes amounts applicable to PSEG (parent corporation), Energy Holdings and Services.
Power [Member] |
Basis of Presentation | Basis of Presentation The financial statements included herein have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (SEC) applicable to Quarterly Reports on Form 10-Q. Certain information and note disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (GAAP) have been condensed or omitted pursuant to such rules and regulations. These Condensed Consolidated Financial Statements and Notes to Condensed Consolidated Financial Statements (Notes) should be read in conjunction with, and update and supplement matters discussed in, the Annual Report on Form 10-K for the year ended December 31, 2017. The unaudited condensed consolidated financial information furnished herein reflects all adjustments which are, in the opinion of management, necessary to fairly state the results for the interim periods presented. All such adjustments are of a normal recurring nature. All significant intercompany accounts and transactions are eliminated in consolidation. The year-end Condensed Consolidated Balance Sheets were derived from the audited Consolidated Financial Statements included in the Annual Report on Form 10-K for the year ended December 31, 2017.
Cash, Cash Equivalents and Restricted Cash, Policy [Policy Text Block] | Cash, Cash Equivalents and Restricted Cash Cash equivalents consist of short-term, highly liquid investments with original maturities of three months or less. Restricted cash consists primarily of deposits received related to various construction projects at PSE&G. The following provides a reconciliation of cash, cash equivalents and restricted cash reported within the Condensed Consolidated Balance Sheets that sum to the total of the same such amounts for the beginning (December 31, 2017) and ending periods shown in the Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2018.
|  | PSE&G |  | Power |  | Other (A) |  | Consolidated |
|  | Millions |
| As of December 31, 2017 |  |  |  |  |  |  |  |
| Cash and Cash Equivalents | $ | 242 |  |  | $ | 32 |  |  | $ | 39 |  |  | $ | 313 |  |
| Restricted Cash in Other Current Assets | — |  |  | — |  |  | — |  |  | — |  |
| Restricted Cash in Other Noncurrent Assets | 2 |  |  | — |  |  | — |  |  | 2 |  |
| Cash, Cash Equivalents and Restricted Cash | $ | 244 |  |  | $ | 32 |  |  | $ | 39 |  |  | $ | 315 |  |
| As of June 30, 2018 |  |  |  |  |  |  |  |
| Cash and Cash Equivalents | $ | 20 |  |  | $ | 20 |  |  | $ | 55 |  |  | $ | 95 |  |
| Restricted Cash in Other Current Assets | 4 |  |  | — |  |  | — |  |  | 4 |  |
| Restricted Cash in Other Noncurrent Assets | 12 |  |  | — |  |  | — |  |  | 12 |  |
| Cash, Cash Equivalents and Restricted Cash | $ | 36 |  |  | $ | 20 |  |  | $ | 55 |  |  | $ | 111 |  |
(A) | Includes amounts applicable to PSEG (parent corporation), Energy Holdings and Services.
PSE And G [Member] |
Basis of Presentation | Basis of Presentation The financial statements included herein have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (SEC) applicable to Quarterly Reports on Form 10-Q. Certain information and note disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (GAAP) have been condensed or omitted pursuant to such rules and regulations. These Condensed Consolidated Financial Statements and Notes to Condensed Consolidated Financial Statements (Notes) should be read in conjunction with, and update and supplement matters discussed in, the Annual Report on Form 10-K for the year ended December 31, 2017. The unaudited condensed consolidated financial information furnished herein reflects all adjustments which are, in the opinion of management, necessary to fairly state the results for the interim periods presented. All such adjustments are of a normal recurring nature. All significant intercompany accounts and transactions are eliminated in consolidation. The year-end Condensed Consolidated Balance Sheets were derived from the audited Consolidated Financial Statements included in the Annual Report on Form 10-K for the year ended December 31, 2017.
Cash, Cash Equivalents and Restricted Cash, Policy [Policy Text Block] | Cash, Cash Equivalents and Restricted Cash Cash equivalents consist of short-term, highly liquid investments with original maturities of three months or less. Restricted cash consists primarily of deposits received related to various construction projects at PSE&G. The following provides a reconciliation of cash, cash equivalents and restricted cash reported within the Condensed Consolidated Balance Sheets that sum to the total of the same such amounts for the beginning (December 31, 2017) and ending periods shown in the Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2018.
|  | PSE&G |  | Power |  | Other (A) |  | Consolidated |
|  | Millions |
| As of December 31, 2017 |  |  |  |  |  |  |  |
| Cash and Cash Equivalents | $ | 242 |  |  | $ | 32 |  |  | $ | 39 |  |  | $ | 313 |  |
| Restricted Cash in Other Current Assets | — |  |  | — |  |  | — |  |  | — |  |
| Restricted Cash in Other Noncurrent Assets | 2 |  |  | — |  |  | — |  |  | 2 |  |
| Cash, Cash Equivalents and Restricted Cash | $ | 244 |  |  | $ | 32 |  |  | $ | 39 |  |  | $ | 315 |  |
| As of June 30, 2018 |  |  |  |  |  |  |  |
| Cash and Cash Equivalents | $ | 20 |  |  | $ | 20 |  |  | $ | 55 |  |  | $ | 95 |  |
| Restricted Cash in Other Current Assets | 4 |  |  | — |  |  | — |  |  | 4 |  |
| Restricted Cash in Other Noncurrent Assets | 12 |  |  | — |  |  | — |  |  | 12 |  |
| Cash, Cash Equivalents and Restricted Cash | $ | 36 |  |  | $ | 20 |  |  | $ | 55 |  |  | $ | 111 |  |
(A) | Includes amounts applicable to PSEG (parent corporation), Energy Holdings and Services.

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- Definition Entity's cash and cash equivalents accounting policy with respect to restricted balances. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(1)(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 305 -SubTopic 10 -Section 05 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6375392&loc=d3e26790-107797 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4273-108586 + Details
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