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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
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-Section 13
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Fair value, after offset of derivative liability, of 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, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, after offset of derivative asset, of 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, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

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Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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Summary of Significant Accounting Policies Fair value Derivatives, Balance Sheet Location, by Derivative Contract Type (Details) $ in Thousands, ¥ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2016 JPY (¥)	Dec. 31, 2015 JPY (¥)
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	$ 40
Derivative, Notional Amount \| ¥			¥ 697	¥ 661
Derivative, Higher Remaining Maturity Range (in months)	9 months	9 months
Foreign exchange sell-forward contracts [Member] \| Fair Value Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 400	$ 3,200
Foreign exchange buy-forward contracts [Member] \| Fair Value Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	400	300
Designated as Hedging Instrument [Member] \| Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Total derivatives	0	39
Designated as Hedging Instrument [Member] \| Foreign Exchange Contract [Member] \| Other Assets [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange contracts, Other current assets	5	43
Designated as Hedging Instrument [Member] \| Foreign Exchange Contract [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange contracts, Other current liabilties	$ (5)	$ (4)