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

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Exercise price per share or per unit of warrants or rights outstanding.

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Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

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Amount, after accumulated amortization, of debt premium.

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Amount as of the balance sheet date of the unamortized adjustment to the carrying value of an interest-bearing hedged item made under an effective fair value hedge that is amortized upon discontinuation of the fair value hedge.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of expense (income) related to adjustment to fair value of warrant liability.

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Number of new stock issued during the period.

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Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

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Derivative Instruments (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative [Line Items]
Number of securities called by each warrant or right		84.5
Exercise price of warrants or rights		$ 6.43
Warrants and rights outstanding	$ 98	$ 156			$ 98
Fair Value Adjustment of Warrants	7		$ 0		(58)	$ 0
Foreign currency forward contracts
Derivative [Line Items]
Notional amount	1,200	$ 1,600			1,200
Fair Value Hedging \| Interest rate swap
Derivative [Line Items]
Debt instrument, unamortized premium	4				4
Deferred (gain) loss on discontinuation of fair value hedge	$ 9				$ 9
Capital in Excess of Par Value
Derivative [Line Items]
Stock issued during period, shares, new issues		84.5		115.0