Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Dec. 31, 2025	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 61	$ 2,399	$ 2,405
Goodwill decrease in the carrying amount	$ 6
Amortization of intangible assets		$ 95	$ 95	$ 93

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets.

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+ Details

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References

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+ Details