Accumulated Other Comprehensive Loss - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity [Abstract]
Cumulative income tax benefits related to adjustments for pension benefits	$ (24.8)	$ (33.5)	$ (27.0)
Cumulative income tax expense (benefit) related to adjustments for unrealized loss on derivatives	$ (3.6)	$ (8.8)	$ (4.3)

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