Cash And Cash Equivalents Non-Cash Activities (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
NON-CASH INVESTING AND FINANCING ACTIVITIES:
Accrued capital expenditures			$ 1,202	$ 1,059
Losses from subsidiary common unit transactions			0	(125)
Right-of-Use Assets Obtained in Exchange for Liabilities			73	0
Lease assets obtained in exchange for new lease liabilities			36
Stock Issued During Period, Value, Dividend Reinvestment Plan			100
Distributions reinvested	$ 0	$ 0		0
Stock Issued During Period, Value, Conversion of Units	0
Limited Partner [Member]
NON-CASH INVESTING AND FINANCING ACTIVITIES:
Distributions reinvested	(57)	$ (58)
Stock Issued During Period, Value, Conversion of Units	$ 589		$ 0	$ 589

NON-CASH INVESTING ACTIVITIES [Abstract]

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The amount of distributions to electing unitholders reinvested in the Convertible Units. Partnership's Convertible Preferred Units, representing limited partner interests in the Partnership to certain Electing Unitholders, who elected to participate in a plan to forgo a portion of their future potential cash distributions on common units participating in the plan for a period and reinvest those distributions in the Convertible Units.

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Total amount of increases in right-of-use assets obtained in exchange for both operating and lease liabilities.

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No definition available.

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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The profit or loss on sales of previously unissued stock by subsidiaries made to investors outside the consolidated group that is not reported as operating income. Represents the difference in the parent company's carrying amount of the equity interest in the subsidiary or equity investee immediately before and after the transaction.

+ References

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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Value of stock issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

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Value of stock issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the holder of the stock to reinvest dividends paid to them by the entity on new issues of stock by the entity.

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