XML 110 R91.htm IDEA: XBRL DOCUMENT
v3.20.4

Common Stock and Related Matters - Dividends Declared And Or Paid (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Dividends Payable [Line Items] |  |  |  |
Accrued preferred dividends payable date |  | Feb. 12, 2021 |  |
Dividends Declared per Share of Common Stock |  | $ 1.21 | $ 3.64 | $ 3.64
Dividend Declared, Q4 2020 [Member] |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Accrued preferred dividends payable date |  | Feb. 16, 2021 |  |
Total Common Dividends Declared |  | $ 23.3 |  |
Amount of Common Dividends Paid or To Be Paid |  | 22.9 |  |
Accrued Dividends | [1] | $ 0.4 |  |
Dividends Declared per Share of Common Stock |  | $ 0.10000 |  |
Dividend Declared, Q3 2020 [Member] |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Accrued preferred dividends payable date |  | Nov. 16, 2020 |  |
Total Common Dividends Declared |  | $ 23.8 |  |
Amount of Common Dividends Paid or To Be Paid |  | 23.3 |  |
Accrued Dividends | [1] | $ 0.5 |  |
Dividends Declared per Share of Common Stock |  | $ 0.10000 |  |
Dividend Declared, Q2 2020 [Member] |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Accrued preferred dividends payable date |  | Aug. 17, 2020 |  |
Total Common Dividends Declared |  | $ 23.7 |  |
Amount of Common Dividends Paid or To Be Paid |  | 23.3 |  |
Accrued Dividends | [1] | $ 0.4 |  |
Dividends Declared per Share of Common Stock |  | $ 0.10000 |  |
Dividend Declared, Q1 2020 [Member] |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Accrued preferred dividends payable date |  | May 15, 2020 |  |
Total Common Dividends Declared |  | $ 23.7 |  |
Amount of Common Dividends Paid or To Be Paid |  | 23.3 |  |
Accrued Dividends | [1] | $ 0.4 |  |
Dividends Declared per Share of Common Stock |  | $ 0.10000 |  |
Dividend Declared, Q4 2019 [Member] |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Accrued preferred dividends payable date |  |  | Feb. 18, 2020 |
Total Common Dividends Declared |  |  | $ 216.0 |
Amount of Common Dividends Paid or To Be Paid |  |  | 212.0 |
Accrued Dividends | [1] |  | $ 4.0 |
Dividends Declared per Share of Common Stock |  |  | $ 0.91000 |
Dividend Declared, Q3 2019 [Member] |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Accrued preferred dividends payable date |  |  | Nov. 15, 2019 |
Total Common Dividends Declared |  |  | $ 215.5 |
Amount of Common Dividends Paid or To Be Paid |  |  | 211.8 |
Accrued Dividends | [1] |  | $ 3.7 |
Dividends Declared per Share of Common Stock |  |  | $ 0.91000 |
Dividend Declared, Q2 2019 [Member] |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Accrued preferred dividends payable date |  |  | Aug. 15, 2019 |
Total Common Dividends Declared |  |  | $ 215.1 |
Amount of Common Dividends Paid or To Be Paid |  |  | 211.5 |
Accrued Dividends | [1] |  | $ 3.6 |
Dividends Declared per Share of Common Stock |  |  | $ 0.91000 |
Dividend Declared, Q1 2019 [Member] |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Accrued preferred dividends payable date |  |  | May 15, 2019 |
Total Common Dividends Declared |  |  | $ 215.2 |
Amount of Common Dividends Paid or To Be Paid |  |  | 211.5 |
Accrued Dividends | [1] |  | $ 3.7 |
Dividends Declared per Share of Common Stock |  |  | $ 0.91000 |
Dividend Declared, Q4 2018 [Member] |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Accrued preferred dividends payable date |  |  |  | Feb. 15, 2019
Total Common Dividends Declared |  |  |  | $ 215.2
Amount of Common Dividends Paid or To Be Paid |  |  |  | 211.2
Accrued Dividends | [1] |  |  | $ 4.0
Dividends Declared per Share of Common Stock |  |  |  | $ 0.91000
Dividend Declared, Q3 2018 [Member] |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Accrued preferred dividends payable date |  |  |  | Nov. 15, 2018
Total Common Dividends Declared |  |  |  | $ 212.5
Amount of Common Dividends Paid or To Be Paid |  |  |  | 208.6
Accrued Dividends | [1] |  |  | $ 3.9
Dividends Declared per Share of Common Stock |  |  |  | $ 0.91000
Dividend Declared, Q2 2018 [Member] |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Accrued preferred dividends payable date |  |  |  | Aug. 15, 2018
Total Common Dividends Declared |  |  |  | $ 208.9
Amount of Common Dividends Paid or To Be Paid |  |  |  | 205.2
Accrued Dividends | [1] |  |  | $ 3.7
Dividends Declared per Share of Common Stock |  |  |  | $ 0.91000
Dividend Declared, Q1 2018 [Member] |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Accrued preferred dividends payable date |  |  |  | May 16, 2018
Total Common Dividends Declared |  |  |  | $ 203.1
Amount of Common Dividends Paid or To Be Paid |  |  |  | 199.7
Accrued Dividends | [1] |  |  | $ 3.4
Dividends Declared per Share of Common Stock |  |  |  | $ 0.91000
[1] | Represents accrued dividends on restricted stock and restricted stock units that are payable upon vesting.

X
- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
Name: | us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date the declared dividend will be paid, in CCYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586 + Details
Name: | us-gaap_DividendPayableDateToBePaidDayMonthAndYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
Name: | us-gaap_DividendsCommonStockCash
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + 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 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6935-107765 + Details
Name: | us-gaap_DividendsPayableCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_DividendsPayableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfDividendsCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_DividendsAxis=trgp_DividendDeclaredQ42020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=trgp_DividendDeclaredQ32020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=trgp_DividendDeclaredQ22020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=trgp_DividendDeclaredQ12020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=trgp_DividendDeclaredQ42019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=trgp_DividendDeclaredQ32019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=trgp_DividendDeclaredQ22019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=trgp_DividendDeclaredQ12019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=trgp_DividendDeclaredQ42018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=trgp_DividendDeclaredQ32018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=trgp_DividendDeclaredQ22018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=trgp_DividendDeclaredQ12018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |