Interest Rate Risk Managment (Details) $ in Millions |
1 Months Ended | ||
---|---|---|---|
Dec. 31, 2015
USD ($)
|
Dec. 30, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
|
Derivative [Line Items] | |||
Number of Fixed-to-Variable Interest Rate Swap Agreements Entered Into | 9 | ||
Interest Rate Swap [Member] | |||
Derivative [Line Items] | |||
Derivative, Notional Amount | $ 11,000 | $ 1,300 | $ 9,200 |
KMP 3.50% Senior Notes due September 1, 2023 [Member] | |||
Derivative [Line Items] | |||
Debt Instrument, Interest Rate, Stated Percentage | 3.50% | ||
4.15% Senior Notes due February 1, 2024 [Member] [Member] | |||
Derivative [Line Items] | |||
Debt Instrument, Interest Rate, Stated Percentage | 4.15% | ||
EPB 4.30% Senior Notes due May 1, 2024 [Member] | |||
Derivative [Line Items] | |||
Debt Instrument, Interest Rate, Stated Percentage | 4.30% | ||
Fair Value Hedging [Member] | Interest Rate Swap [Member] | |||
Derivative [Line Items] | |||
Derivative, Notional Amount | $ 9,700 |