Intangible Assets, net

A reconciliation of the activity affecting intangible assets, net is as follows:



(In thousands)	Indefinite- Lived Trademarks			Finite-Lived Trademarks and Customer Relationships			Totals
Gross Carrying Amounts
Balance — March 31, 2018	$	2,490,303		$	441,314		$	2,931,617
Reductions	(30,562		)	(34,889		)	(65,451		)
Effects of foreign currency exchange rates	(5,117		)	(287		)	(5,404		)
Balance — September 30, 2018	2,454,624			406,138			2,860,762

Accumulated Amortization
Balance — March 31, 2018	—			150,701			150,701
Additions	—			11,181			11,181
Reductions	—			(16,136		)	(16,136		)
Effects of foreign currency exchange rates	—			(54		)	(54		)
Balance — September 30, 2018	—			145,692			145,692

Intangible assets, net — September 30, 2018	$	2,454,624		$	260,446		$	2,715,070

As discussed in Note 3, on July 2, 2018, we sold our Household Cleaning segment. As a result, we decreased our indefinite-lived intangibles by $30.5 million and our net finite-lived trademarks by $18.8 million.

Amortization expense was $5.4 million and $11.2 million for the three and six months ended September 30, 2018, respectively, and $5.8 million and $11.7 million for the three and six months ended September 30, 2017, respectively. Based on our amortizable intangible assets as of September 30, 2018, amortization expense is expected to be approximately $10.7 million for the remainder of fiscal 2019, $21.5 million in fiscal 2020, $21.0 million in fiscal 2021 and $20.6 million in each of fiscal 2022, 2023 and 2024.

Under accounting guidelines, indefinite-lived assets are not amortized, but must be tested for impairment annually, or more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of the asset below the carrying amount. The date of our annual impairment review was February 28, 2018, and we recorded impairment charges in our March 31, 2018 financial statements. Additionally, at each reporting period, an evaluation must be made to determine whether events and circumstances continue to support an indefinite useful life. Intangible assets with finite lives are amortized over their respective estimated useful lives and are also tested for impairment whenever events or changes in circumstances indicate that the carrying value of the asset may not be recoverable and exceeds its fair value.

We utilize the excess earnings method to estimate the fair value of our individual indefinite-lived intangible assets. The discount rate utilized in the analyses, as well as future cash flows, may be influenced by such factors as changes in interest rates and rates of inflation. Additionally, should the related fair values of intangible assets be adversely affected as a result of declining sales or margins caused by competition, changing consumer preferences, technological advances or reductions in advertising and promotional expenses, we may be required to record impairment charges in the future.

As of September 30, 2018, no events have occurred that would indicate further potential impairment of intangible assets.