XML 84 R64.htm IDEA: XBRL DOCUMENT
v3.19.1

LONG-TERM DEBT (Details) $ in Millions | Mar. 31, 2019 USD ($)
--- | ---
KCP&L | Unsecured Debt | Senior Notes due 2023 KCPL |
Debt Instrument [Line Items] |
Long-term debt gross | $ 300.0
Interest rates (in hundredths) | 3.15%
KCP&L | Unsecured Debt | Senior Notes due 2025 KCPL |
Debt Instrument [Line Items] |
Long-term debt gross | $ 350.0
Interest rates (in hundredths) | 3.65%
KCP&L | Unsecured Debt | Senior notes due 2035 KCPL |
Debt Instrument [Line Items] |
Long-term debt gross | $ 250.0
Interest rates (in hundredths) | 6.05%
KCP&L | Unsecured Debt | Senior Notes Due 2041 KCPL |
Debt Instrument [Line Items] |
Long-term debt gross | $ 400.0
Interest rates (in hundredths) | 5.30%
KCP&L | Unsecured Debt | Senior Notes Due 2047 KCPL |
Debt Instrument [Line Items] |
Long-term debt gross | $ 300.0
Interest rates (in hundredths) | 4.20%
KCP&L | Unsecured Debt | Senior Notes Due 2048 KCPL |
Debt Instrument [Line Items] |
Long-term debt gross | $ 300.0
Interest rates (in hundredths) | 4.20%
KCP&L | Senior Notest | Senior Notes Due 2049 KCPL |
Debt Instrument [Line Items] |
Long-term debt gross | $ 400.0
Interest rates (in hundredths) | 4.125%
KCP&L | Senior Notest | Senior Notes Due 2019 KCPL |
Debt Instrument [Line Items] |
Interest rates (in hundredths) | 7.15%
Repayments of long-term debt | $ 400.0
GMO | Senior Notest | Senior Notes Due 2022 GMO |
Debt Instrument [Line Items] |
Long-term debt gross | $ 100.0
Interest rates (in hundredths) | 3.74%

X
- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: 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(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
Name: | us-gaap_RepaymentsOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=evrg_KCPLMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=evrg_SeniorNotesDue2023KcplMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=evrg_SeniorNotesdue2025KCPLMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=evrg_SeniorNotesDue2035KcplMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=evrg_SeniorNotesDue2041KcplMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=evrg_SeniorNotesDue2047KCPLMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=evrg_SeniorNotesDue2048KCPLMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=evrg_SeniorNotesDue2049KCPLMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=evrg_SeniorNotesDue2019KCPLMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=evrg_KcplGreaterMissouriOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=evrg_SeniorNotesDue2022GMOMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |