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Goodwill and Intangible Assets
 12 Months Ended
Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Goodwill and Intangible Assets
Goodwill
Goodwill was $2,405 million and $2,344 million as of March 31, 2025 and March 31, 2024, respectively. The $61 million increase in the carrying amount of goodwill was attributable to the Company's finalization of the accounting for the acquisition of PGSC.
Intangible Assets
Intangible assets consisted of the following:
March 31, 2025March 31, 2024
Gross Carrying ValueAccumulated AmortizationNet Carrying ValueGross Carrying ValueAccumulated AmortizationNet Carrying Value
Amortizable intangible assets:
Customer contracts and related customer relationships$619 $305 $314 $592 $238 $354 
Software168 109 59 146 89 57 
Total amortizable intangible assets$787 $414 $373 $738 $327 $411 
Unamortizable intangible assets:
Trade name$190 $— $190 $190 $— $190 
Total$977 $414 $563 $928 $327 $601 
The $27 million increase in the gross carrying value of amortizable intangible assets (excluding software) was primarily attributable to the Company’s acquisition of PGSC.
Amortization expense for fiscal 2025, 2024, and 2023 was $95 million, $93 million, and $94 million, respectively.
The following table summarizes the estimated annual amortization expense for future periods:
For the Fiscal Year Ended March 31,
2026$86 
202766 
202857 
202948 
203040 
Thereafter76 
Total estimated amortization expense$373