INTANGIBLE ASSETS INCLUDING GOODWILL - Intangible Assets Activity (Details) - USD ($) $ in Millions	12 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Intangible assets
Net carrying amount of intangible assets decrease	$ (53)
Intangible asset amortization including capitalized software	57	$ 72	$ 63
Capitalized software
Intangible assets
Intangible asset amortization expense	$ 30

The aggregate expense net of any currency impact 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. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

No definition available.

Name:	kd_AmortizationOfIntangibleAssetsNetOfCurrencyImpact
Namespace Prefix:	kd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration