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Debt - Schedule of Current Portion of Debt (Details) - USD ($) $ / shares in Units, $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Debt Instrument [Line Items] |  |
Current portion of debt | $ 2,558 | $ 2,477
Debt, weighted average interest rate | 4.86% | 5.27%
$4 billion credit facility due November 16, 2023 |  |
Debt Instrument [Line Items] |  |
Current portion of debt | $ 0 | $ 0
Maximum borrowing capacity | 4,000 |
Commercial Paper |  |
Debt Instrument [Line Items] |  |
Current portion of debt | 0 | $ 37
Maximum borrowing capacity | 4,000 |
Debt, weighted average interest rate |  | 1.90%
6.85%, due February 2020 | Senior Notes |  |
Debt Instrument [Line Items] |  |
Current portion of debt | 0 | $ 700
Interest rate, stated percentage |  | 6.85%
6.50%, due April 2020 | Senior Notes |  |
Debt Instrument [Line Items] |  |
Current portion of debt | 0 | $ 535
Interest rate, stated percentage |  | 6.50%
5.30%, due September 2020 | Senior Notes |  |
Debt Instrument [Line Items] |  |
Current portion of debt | 0 | $ 600
Interest rate, stated percentage |  | 5.30%
6.50%, due September 2020 | Senior Notes |  |
Debt Instrument [Line Items] |  |
Current portion of debt | 0 | $ 349
Interest rate, stated percentage |  | 6.50%
5.00%, due February 2021 | Senior Notes |  |
Debt Instrument [Line Items] |  |
Current portion of debt | $ 750 | $ 0
Interest rate, stated percentage | 5.00% |
3.50%, due March 2021(b) | Senior Notes |  |
Debt Instrument [Line Items] |  |
Current portion of debt | $ 750 | 0
Interest rate, stated percentage | 3.50% |
5.80%, due March 2021 | Senior Notes |  |
Debt Instrument [Line Items] |  |
Current portion of debt | $ 400 | 0
Interest rate, stated percentage | 5.80% |
5.00%, due October 2021 | Senior Notes |  |
Debt Instrument [Line Items] |  |
Current portion of debt | $ 500 | 0
Interest rate, stated percentage | 5.00% |
Trust I Preferred Securities, 4.75% due March 2028(c) | Capital Trust I |  |
Debt Instrument [Line Items] |  |
Current portion of debt | $ 111 | 111
Interest rate, stated percentage | 4.75% |
Liquidation preference | $ 50 |
KMGP, $1,000 Liquidation Value Series A Fixed-to-Floating Rate Term Cumulative Preferred Stock, due August 2057(d) | Kinder Morgan G.P., Inc. |  |
Debt Instrument [Line Items] |  |
Current portion of debt | $ 0 | $ 100
Liquidation preference |  | $ 1,000
Other debt |  |
Debt Instrument [Line Items] |  |
Current portion of debt | $ 47 | $ 45

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- Definition Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or 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 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- 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=120391452&loc=d3e13212-122682 + Details
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