Fair Value Disclosures - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Assets
Derivative assets	$ 151	$ 167
Liabilities
Derivative liabilities	156	99
Level 1 \| Fair Value, Measurements, Recurring
Assets
Derivative assets	0	0
Investments and securities*	21	18
Total	21	18
Liabilities
Derivative liabilities	0	0
Level 2 \| Fair Value, Measurements, Recurring
Assets
Derivative assets	151	167
Investments and securities*	0	0
Total	151	167
Liabilities
Derivative liabilities	156	99
Level 3 \| Fair Value, Measurements, Recurring
Assets
Derivative assets	0	0
Investments and securities*	30	28
Total	30	28
Liabilities
Derivative liabilities	$ 0	$ 0

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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