Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Nominal or face amount used to calculate payments on the derivative asset.

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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Financial Instruments (Narrative) (Details) $ in Billions				3 Months Ended			6 Months Ended
Financial Instruments (Narrative) (Details) $ in Billions	Mar. 31, 2019 USD ($)	Mar. 31, 2019 CAD ($)	Mar. 07, 2019 CAD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Mar. 07, 2019 USD ($)	Mar. 07, 2019 CAD ($)	Dec. 31, 2018 USD ($)
Derivative [Line Items]
Unrealized gain (loss) on derivatives				$ (266,000,000)			$ (660,000,000)
Derivative, gain (loss) on derivative, net				(266,000,000)		$ 0	(691,000,000)	$ 0
Equity Contract, Preemptive Rights [Member]
Derivative [Line Items]
Unrealized gain (loss) on derivatives				(80,000,000)			(212,000,000)
Equity Contract, Warrant [Member]
Derivative [Line Items]
Unrealized gain (loss) on derivatives				(186,000,000)			(448,000,000)
Not Designated as Hedging Instrument [Member] \| Forward Contracts [Member]
Derivative [Line Items]
Derivative asset, notional amount									$ 1,800,000,000	$ 2.4
Derivative, gain (loss) on derivative, net					$ (31,000,000)
Cronos Group Inc. [Member]
Derivative [Line Items]
Equity method investments, purchase price	$ 1,800,000,000	$ 2.4	$ 2.4
Foreign Currency Denominated Debt [Member]
Derivative [Line Items]
Debt instrument, fair value disclosure				5,085,000,000			5,085,000,000
Long-term debt				4,807,000,000			4,807,000,000				$ 0
Net Investment Hedging [Member] \| Foreign currency contracts [Member]
Derivative [Line Items]
Derivative, notional amount				$ 1,391,000,000			$ 1,391,000,000				$ 1,226,000,000