Accumulated Other Comprehensive Loss - Additional Information (Details) - USD ($) $ in Millions	Mar. 31, 2022	Mar. 31, 2021
Equity [Abstract]
Cumulative income tax benefit on pension and postretirement benefit plans	$ (24.4)	$ (33.0)
Cumulative income tax benefit on derivatives	$ (1.0)	$ (7.5)

Cumulative Other Comprehensive Income Loss, Pension And Other Postretirement Benefit Plans, Income Tax Expense (Benefit)

No definition available.

Name:	axta_CumulativeOtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansIncomeTaxExpenseBenefit
Namespace Prefix:	axta_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant