Derivatives and Hedging	12 Months Ended
Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging	Note 10: Derivatives and Hedging We are exposed to market risk and foreign currency exchange risk from changes in foreign currency exchange rates, which could affect operating results, financial position, and cash flows. We manage our exposure to these risks through our regular operating and financing activities and, when appropriate, through the use of derivative financial instruments. These derivative financial instruments are used to hedge monetary assets and liabilities, intercompany balances, trade receivables, anticipated cash flows, and to reduce earnings and cash flow volatility resulting from shifts in foreign currency exchange rates. Our objective is to offset gains and losses resulting from these exposures with losses and gains on the derivative contracts used to hedge them, thereby reducing volatility of earnings or protecting fair values of assets and liabilities. We do not have any leveraged derivatives, nor do we use derivative contracts for speculative purposes. ASC 815 requires the fair value of all derivative instruments, including those embedded in other contracts, to be recorded as assets or liabilities in our Consolidated Balance Sheet. The related cash flow impacts of our derivative contracts are reflected as cash flows from operating activities. Our exposures are primarily related to non-U.S. dollar-denominated revenue in Europe, the U.K., Latin America, China, Israel, and Australia, and to non-U.S. dollar-denominated operating expenses in Europe, India, Japan, the U.K., China, Israel, Brazil, and Australia. We hedge our operating expense cash flow exposure in Indian rupees. We hedge balance sheet remeasurement exposure associated with British pound sterling, Brazilian real, Israeli shekel, Japanese yen, Chinese renminbi, and Euro-denominated intercompany balances; Brazilian real, British pound sterling, Australian dollar, Israeli shekel, and Euro-denominated trade receivables; and British pound sterling, Indian rupee, Israeli shekel, and Euro-denominated-denominated net monetary assets. By their nature, derivative instruments involve, to varying degrees, elements of market and credit risk. The market risk associated with these instruments resulting from currency exchange movement is expected to offset the market risk of the underlying transactions, assets, and liabilities being hedged (i.e., operating expense exposure in Indian rupees; the collection of trade receivables denominated in currencies other than their respective reporting entity’s functional currency, and the settlement of intercompany balances denominated in currencies other than their functional currency). Under our master netting agreements with our foreign currency derivative counterparties, we are allowed to net transactions of the same currency with a single net amount payable by one party to the other. The derivatives held by us are not subject to any credit contingent features negotiated with these counterparties. We are not required to pledge cash collateral related to these foreign currency derivatives because, by policy, we deal with counterparties having a minimum investment grade or better credit rating. Credit risk is managed through the continuous monitoring of exposures to such counterparties. Cash Flow Hedges Foreign currency derivative contracts with notional amounts of $3.9 and $3.2 million and net asset/liability amounts that are immaterial have been designated as cash flow hedges of our Indian rupee operating expense exposure at December 31, 2017 and 2016. The changes in fair value of these contracts are reported as a component of OCI and reclassified to operating expense in the periods of payment of the hedged operating expenses. The ineffective portion of the derivative hedging gain or loss, as well as changes in the derivative time value (which is excluded from the assessment of hedge effectiveness), are recognized as a component of interest income and other income (expense), net. Balance Sheet Hedges Forward contracts not designated as hedging instruments with notional amounts of $235.5 and $158.7 million are used to hedge foreign currency balance sheet exposures at December 31, 2017 and 2016, respectively. They are not designated for hedge accounting treatment since there is a natural offset for the remeasurement of the underlying foreign currency denominated asset or liability. We recognize changes in the fair value of non-designated derivative instruments in earnings in the period of change. Gains and losses on foreign currency forward contracts used to hedge balance sheet exposures are recognized in interest income and other income (expense), net, in the same period as the remeasurement gain or loss of the related foreign currency denominated assets and liabilities. Forward contracts not designated for hedge accounting treatment consist of hedges of British pound sterling, Brazilian real, Israeli shekel, Japanese yen, Chinese renminbi, and Euro-denominated intercompany balances with notional amounts of $144.5 and $90.7 million at December 31, 2017 and 2016, respectively, hedges of Brazilian real, British pound sterling, Australian dollar, Israeli shekel, and Euro-denominated trade receivables with notional amounts of $44.4 and $39.8 million at December 31, 2017 and 2016, respectively, and hedges of British pounds sterling, Indian rupee, Israeli shekel, and Euro-denominated other net monetary assets with notional amounts of $46.6 and $28.2 million at December 31, 2017 and 2016, respectively.

Note 10: Derivatives and Hedging

We are exposed to market risk and foreign currency exchange risk from changes in foreign currency exchange rates, which could affect operating results, financial position, and cash flows. We manage our exposure to these risks through our regular operating and financing activities and, when appropriate, through the use of derivative financial instruments. These derivative financial instruments are used to hedge monetary assets and liabilities, intercompany balances, trade receivables, anticipated cash flows, and to reduce earnings and cash flow volatility resulting from shifts in foreign currency exchange rates. Our objective is to offset gains and losses resulting from these exposures with losses and gains on the derivative contracts used to hedge them, thereby reducing volatility of earnings or protecting fair values of assets and liabilities. We do not have any leveraged derivatives, nor do we use derivative contracts for speculative purposes. ASC 815 requires the fair value of all derivative instruments, including those embedded in other contracts, to be recorded as assets or liabilities in our Consolidated Balance Sheet. The related cash flow impacts of our derivative contracts are reflected as cash flows from operating activities.

Our exposures are primarily related to non-U.S. dollar-denominated revenue in Europe, the U.K., Latin America, China, Israel, and Australia, and to non-U.S. dollar-denominated operating expenses in Europe, India, Japan, the U.K., China, Israel, Brazil, and Australia. We hedge our operating expense cash flow exposure in Indian rupees. We hedge balance sheet remeasurement exposure associated with British pound sterling, Brazilian real, Israeli shekel, Japanese yen, Chinese renminbi, and Euro-denominated intercompany balances; Brazilian real, British pound sterling, Australian dollar, Israeli shekel, and Euro-denominated trade receivables; and British pound sterling, Indian rupee, Israeli shekel, and Euro-denominated-denominated net monetary assets.

By their nature, derivative instruments involve, to varying degrees, elements of market and credit risk. The market risk associated with these instruments resulting from currency exchange movement is expected to offset the market risk of the underlying transactions, assets, and liabilities being hedged (i.e., operating expense exposure in Indian rupees; the collection of trade receivables denominated in currencies other than their respective reporting entity’s functional currency, and the settlement of intercompany balances denominated in currencies other than their functional currency). Under our master netting agreements with our foreign currency derivative counterparties, we are allowed to net transactions of the same currency with a single net amount payable by one party to the other. The derivatives held by us are not subject to any credit contingent features negotiated with these counterparties. We are not required to pledge cash collateral related to these foreign currency derivatives because, by policy, we deal with counterparties having a minimum investment grade or better credit rating. Credit risk is managed through the continuous monitoring of exposures to such counterparties.

Cash Flow Hedges

Foreign currency derivative contracts with notional amounts of $3.9 and $3.2 million and net asset/liability amounts that are immaterial have been designated as cash flow hedges of our Indian rupee operating expense exposure at December 31, 2017 and 2016. The changes in fair value of these contracts are reported as a component of OCI and reclassified to operating expense in the periods of payment of the hedged operating expenses. The ineffective portion of the derivative hedging gain or loss, as well as changes in the derivative time value (which is excluded from the assessment of hedge effectiveness), are recognized as a component of interest income and other income (expense), net.

Balance Sheet Hedges

Forward contracts not designated as hedging instruments with notional amounts of $235.5 and $158.7 million are used to hedge foreign currency balance sheet exposures at December 31, 2017 and 2016, respectively. They are not designated for hedge accounting treatment since there is a natural offset for the remeasurement of the underlying foreign currency denominated asset or liability. We recognize changes in the fair value of non-designated derivative instruments in earnings in the period of change. Gains and losses on foreign currency forward contracts used to hedge balance sheet exposures are recognized in interest income and other income (expense), net, in the same period as the remeasurement gain or loss of the related foreign currency denominated assets and liabilities. Forward contracts not designated for hedge accounting treatment consist of hedges of British pound sterling, Brazilian real, Israeli shekel, Japanese yen, Chinese renminbi, and Euro-denominated intercompany balances with notional amounts of $144.5 and $90.7 million at December 31, 2017 and 2016, respectively, hedges of Brazilian real, British pound sterling, Australian dollar, Israeli shekel, and Euro-denominated trade receivables with notional amounts of $44.4 and $39.8 million at December 31, 2017 and 2016, respectively, and hedges of British pounds sterling, Indian rupee, Israeli shekel, and Euro-denominated other net monetary assets with notional amounts of $46.6 and $28.2 million at December 31, 2017 and 2016, respectively.