Derivative Instruments

Freestanding Derivative Forward Contracts

The Company has international operations and is thus subject to foreign currency rate fluctuations. Approximately 99% of the Company's sales are U.S. Dollar denominated. However, a significant amount of the Company's expenses and liabilities are denominated in foreign currencies and subject to foreign currency rate fluctuations. To help manage the risk of changes in foreign currency rates, the Company periodically enters into derivative contracts comprised of foreign currency forward contracts to hedge its asset and liability foreign currency exposure and a portion of its foreign currency operating expenses. Net gains due to foreign exchange rate fluctuations after the effects of hedging activity were $9.3 million, $1.0 million, and $0.7 million in fiscal 2018, 2017 and 2016. As of March 31, 2018 and 2017, the Company had no foreign currency forward contracts outstanding. The Company recognized net realized gains on foreign currency forward contracts of $4.2 million in the year ended March 31, 2018, compared to net losses of $2.3 million in 2017 and an immaterial amount in 2016. Gains and losses from changes in the fair value of these foreign currency forward contracts and foreign currency exchange rate fluctuations are credited or charged to other income (expense). The Company does not apply hedge accounting to its foreign currency derivative instruments.

Commodity Price Risk

The Company is exposed to fluctuations in prices for energy that it consumes, particularly electricity and natural gas. The Company also enters into variable-priced contracts for some purchases of electricity and natural gas, on an index basis. The Company seeks, or may seek, to partially mitigate these exposures through fixed-price contracts. These contracts meet the characteristics of derivative instruments, but generally qualify for the "normal purchases or normal sales" exception under authoritative guidance and require no mark-to-market adjustment.

Fair Value Hedges

For derivative instruments that are designated and qualify as fair value hedges, the gain or loss on the derivatives as well as the offsetting gain or loss on the hedged item attributable to the hedged risk are recognized in earnings. Interest rate derivative instruments designated as fair value hedges are designed to manage the exposure to interest rate movements and to reduce borrowing costs by converting fixed-rate debt into floating-rate debt. Under these agreements, the Company agrees to exchange, at specified intervals, the difference between the fixed and floating interest amounts calculated by reference to an agreed-upon notional principal amount.

In March 2015, the Company entered into ten-year fixed-to-floating interest rate swap agreements designated as fair value hedges of the changes in fair value of a portion of the Company's fixed-rate 1.625% 2015 Senior Debt due to changes in the LIBOR swap rate, the designated benchmark interest rate. The Company pays variable interest equal to the three-month LIBOR minus 53.6 basis points and it receives a fixed interest rate of 1.625%. The notional amount of these contracts outstanding at March 31, 2015 was $431.3 million, representing 25% of the principal amount of the 2015 Senior Debt.

In February 2016, the Company terminated its interest rate swap agreements. Upon termination, the contracts were in an asset position, resulting in cash receipts of approximately $25.7 million, which included $3.7 million of accrued interest. The gain from terminating the interest rate swap agreements increased the outstanding balance of the 2015 Senior Debt and is being amortized as a reduction of interest expense over the remaining life of the debt. The cash flows from the termination of these interest rate swap agreements have been reported as operating activities in the consolidated statements of cash flows.

The following table summarizes the location and amount of the gain or loss on the hedged item attributable to the changes in the LIBOR swap rate and the offsetting gain or loss on the related interest rate swap agreements for the year ended March 31, 2016. The difference represents hedge ineffectiveness (amounts in millions):



	Year ended March 31,
	2016
Income Statement Classification	Gain (Loss) on 2015 Senior Debt			Gain (Loss) on Interest Rate Swap
Other (loss) income, net	$	(18.1	)	$	16.3