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Lines of Credit and Short-Term Borrowings (Tables) | 12 Months Ended
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Dec. 31, 2018
Lines of Credit and Short-Term Borrowings |
Schedule of consolidated credit facilities and amounts available and outstanding | The table below presents the consolidated credit facilities and the amounts available and outstanding as of December 31, 2018 and 2017 (dollars in thousands):
| December 31, 2018 |  | December 31, 2017
| Pinnacle West | APS | Total |  | Pinnacle West | APS | Total
Commitments under Credit Facilities | $ | 350,000 |  | $ | 1,000,000 |  | $ | 1,350,000 |  |  | $ | 325,000 |  | $ | 1,000,000 |  | $ | 1,325,000 |
Outstanding Commercial Paper and Revolving Credit Facility Borrowings | (76,400 | ) | — |  | (76,400 | ) |  | (95,400 | ) | — |  | (95,400 | )
Amount of Credit Facilities Available | $ | 273,600 |  | $ | 1,000,000 |  | $ | 1,273,600 |  |  | $ | 229,600 |  | $ | 1,000,000 |  | $ | 1,229,600 |
Weighted-Average Commitment Fees | 0.125% | 0.100% |  |  | 0.125% | 0.100% |

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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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