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Derivative Assets And Liabilities (Tables)
 12 Months Ended
Dec. 31, 2018
General Discussion of Derivative Instruments and Hedging Activities [Abstract]  
Offsetting Assets [Table Text Block]
The following table presents the fair value of our recognized derivative assets and liabilities on a gross basis and amounts offset on the consolidated balance sheets that are subject to enforceable master netting arrangements or similar arrangements:
 
 
 
 
Asset Derivatives
 
Liability Derivatives
 
 
Balance Sheet Location
 
December 31, 2018
 
December 31, 2017
 
December 31, 2018
 
December 31, 2017
Derivatives without offsetting agreements
 
Derivative liabilities
 
$
—

 
$
—

 
$
(163
)
 
$
(219
)
Derivatives in offsetting agreements:
 
 
 
 
 
 
 
 
OTC contracts
 
Derivative assets (liabilities)
 
158

 
45

 
(173
)
 
(58
)
Broker cleared derivative contracts
 
Other current assets (liabilities)
 
402

 
276

 
(410
)
 
(283
)
 
 
560

 
321

 
(746
)
 
(560
)
Offsetting agreements:
 
 
 
 
 
 
 
 
Counterparty netting
 
Derivative assets (liabilities)
 
(47
)
 
(21
)
 
47

 
21

Counterparty netting
 
Other current assets (liabilities)
 
(397
)
 
(263
)
 
397

 
263

Total net derivatives
 
$
116

 
$
37

 
$
(302
)
 
$
(276
)
Outstanding Commodity-Related Derivatives
The following table details our outstanding commodity-related derivatives: 
 
December 31, 2018
 
December 31, 2017
 
Notional
Volume
 
Maturity
 
Notional
Volume
 
Maturity
Mark-to-Market Derivatives
 
 
 
 
 
 
 
(Trading)
 
 
 
 
 
 
 
Natural Gas (BBtu):
 
 
 
 
 
 
 
Fixed Swaps/Futures
468

 
2019
 
1,078

 
2018
Basis Swaps IFERC/NYMEX(1)
16,845

 
2019-2020
 
48,510

 
2018-2020
Options – Puts
10,000

 
2019
 
13,000

 
2018
Power (Megawatt):
 
 
 
 
 
 
 
Forwards
3,141,520

 
2019
 
435,960

 
2018-2019
Futures
56,656

 
2019-2021
 
(25,760
)
 
2018
Options – Puts
18,400

 
2019
 
(153,600
)
 
2018
Options – Calls
284,800

 
2019
 
137,600

 
2018
(Non-Trading)
 
 
 
 
 
 
 
Natural Gas (BBtu):
 
 
 
 
 
 
 
Basis Swaps IFERC/NYMEX
(30,228
)
 
2019-2021
 
4,650

 
2018-2020
Swing Swaps IFERC
54,158

 
2019-2020
 
87,253

 
2018-2019
Fixed Swaps/Futures
(1,068
)
 
2019-2021
 
(4,390
)
 
2018-2019
Forward Physical Contracts
(123,254
)
 
2019-2020
 
(145,105
)
 
2018-2020
NGL (MBbls) – Forwards/Swaps
(2,135
)
 
2019
 
(2,493
)
 
2018-2019
Crude (MBbls) – Forwards/Swaps
20,888

 
2019
 
9,237

 
2018-2019
Refined Products (MBbls) – Futures
(1,403
)
 
2019
 
(3,901
)
 
2018-2019
Corn (thousand bushels)
(1,920
)
 
2019
 
1,870

 
2018
Fair Value Hedging Derivatives
 
 
 
 
 
 
 
(Non-Trading)
 
 
 
 
 
 
 
Natural Gas (BBtu):
 
 
 
 
 
 
 
Basis Swaps IFERC/NYMEX
(17,445
)
 
2019
 
(39,770
)
 
2018
Fixed Swaps/Futures
(17,445
)
 
2019
 
(39,770
)
 
2018
Hedged Item – Inventory
17,445

 
2019
 
39,770

 
2018

(1) 
Includes aggregate amounts for open positions related to Houston Ship Channel, Waha Hub, NGPL TexOk, West Louisiana Zone and Henry Hub locations.
Interest Rate Swaps Outstanding
The following table summarizes our interest rate swaps outstanding, none of which are designated as hedges for accounting purposes:
Term
 
Type (1)
 
Notional Amount Outstanding
December 31, 2018
 
December 31, 2017
July 2018 (2)
 
Forward-starting to pay a fixed rate of 3.76% and receive a floating rate
 
$
—

 
$
300

July 2019 (2)
 
Forward-starting to pay a fixed rate of 3.56% and receive a floating rate
 
400

 
300

July 2020 (2)
 
Forward-starting to pay a fixed rate of 3.52% and receive a floating rate
 
400

 
400

July 2021 (2)
 
Forward-starting to pay a fixed rate of 3.55% and receive a floating rate
 
400

 
—

December 2018
 
Pay a floating rate and receive a fixed rate of 1.53%
 
—

 
1,200

March 2019
 
Pay a floating rate and receive a fixed rate of 1.42%
 
300

 
300


(1) 
Floating rates are based on 3-month LIBOR.
Fair Value Of Derivative Instruments
The following table provides a summary of our derivative assets and liabilities: 
 
Fair Value of Derivative Instruments
 
Asset Derivatives
 
Liability Derivatives
 
December 31, 2018
 
December 31, 2017
 
December 31, 2018
 
December 31, 2017
Derivatives designated as hedging instruments:
 
 
 
 
 
 
 
Commodity derivatives (margin deposits)
$
—

 
$
14

 
$
(13
)
 
$
(2
)
 
—

 
14

 
(13
)
 
(2
)
Derivatives not designated as hedging instruments:
 
 
 
 
 
 
 
Commodity derivatives (margin deposits)
402

 
262

 
(397
)
 
(281
)
Commodity derivatives
158

 
45

 
(173
)
 
(58
)
Interest rate derivatives
—

 
—

 
(163
)
 
(219
)
 
560

 
307

 
(733
)
 
(558
)
Total derivatives
$
560

 
$
321

 
$
(746
)
 
$
(560
)
Partnership's Derivative Assets And Liabilities Amount Of Gain (Loss) Recognized
The following tables summarize the amounts recognized with respect to our derivative financial instruments:
 
Location of Gain (Loss) Recognized in Income on Derivatives
 
Amount of Gain (Loss) Recognized in Income Representing Hedge Ineffectiveness and Amount Excluded from the Assessment of Effectiveness
 
 
 
Years Ended December 31,
 
 
 
2018
 
2017
 
2016
Derivatives in fair value hedging relationships (including hedged item):
 
 
 
 
 
 
 
Commodity derivatives
Cost of products sold
 
$
(3
)
 
$
26

 
$
14
Derivatives Not Designated as Hedging Instruments [Table Text Block]
 
Location of Gain (Loss) Recognized in Income on Derivatives
 
Amount of Gain (Loss) Recognized in Income on Derivatives
 
 
 
Years Ended December 31,
 
 
 
2018
 
2017
 
2016
Derivatives not designated as hedging instruments:
 
 
 
 
 
 
 
Commodity derivatives – Trading
Cost of products sold
 
$
32

 
$
31

 
$
(35
)
Commodity derivatives – Non-trading
Cost of products sold
 
(102
)
 
5

 
(177
)
Interest rate derivatives
Gains (losses) on interest rate derivatives
 
47

 
(37
)
 
(12
)
Embedded derivatives
Other, net
 
—

 
1

 
4

Total
 
 
$
(23
)
 
$
—

 
$
(220
)