Fair Value Measurements

Fair value measurements are established utilizing a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets for identical assets or liabilities; Level 2, defined as significant other observable inputs, such as quoted prices in active markets for similar assets or liabilities, or quoted prices in less-active markets for identical assets; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.

The Company’s assets and liabilities measured at fair value on a recurring basis include money market funds and foreign currency exchange contracts. A portion of the Company’s excess cash reserves are held in money market funds which generate interest income based on the prevailing market rates. Money market funds are included in cash and cash equivalents in the Company’s balance sheet. Money market fund holdings are measured at fair value using quoted market prices and are classified within Level 1 of the valuation hierarchy.

When deemed appropriate, the Company minimizes its exposure to changes in foreign currency exchange rates through the use of derivative financial instruments, specifically, foreign exchange forward contracts. The fair value of these contracts are measured at the end of each interim reporting period using observable inputs other than quoted prices, specifically market spot and forward exchange rates. As such, these derivative instruments are classified within Level 2 of the valuation hierarchy. Fair value gains for open contracts are recognized as assets and fair value losses are recognized as liabilities. The fair value derivative assets and liabilities recorded in other current assets and accrued liabilities at September 30, 2017 and December 31, 2016, were not material. Any realized gains or losses would be mitigated by corresponding gains or losses on the underlying exposures.

The Company’s assets measured at fair value on a recurring basis and subject to fair value disclosure requirements at September 30, 2017 and December 31, 2016 were as follows:



			Fair Value Measurements at Reporting Date Using
In millions	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Money market funds, September 30, 2017	$	483	$	483	$	—	$	—
Money market funds, December 31, 2016	$	473	$	473	$	—	$	—