Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Current Assets
Cash and cash equivalents	$ 1,124	$ 915
Accounts and notes receivable - net	1,237	992
Inventories - net	775	661
Prepaid and other current assets	83	70
Total current assets	3,219	2,638
Property, plant and equipment - net of accumulated depreciation (September 30, 2026 - 1,412; December 31, 2025 - 1,450)	1,842	1,701
Other Assets
Goodwill	7,530	7,522
Other intangible assets	972	1,111
Investments and noncurrent receivables	443	402
Deferred income tax assets	45	42
Deferred charges and other assets	666	654
Total other assets	9,656	9,731
Total Assets	14,717	14,070
Current Liabilities
Short-term borrowings	23	24
Accounts payable	886	680
Income taxes payable	141	150
Accrued and other current liabilities	493	502
Total current liabilities	1,543	1,356
Long-Term Debt	3,996	4,003
Other Noncurrent Liabilities
Deferred income tax liabilities	185	273
Pensions and other post-employment benefits - noncurrent	81	80
Other noncurrent obligations	1,023	992
Total other noncurrent liabilities	1,289	1,345
Total Liabilities	6,828	6,704
Commitments and contingent liabilities (Note 13)
Stockholders' Equity
Common stock (authorized 1,666,666,667 shares of $0.01 par value each; issued 2026: 209,164,927 shares; 2025: 209,479,173 shares)	2	2
Preferred stock (authorized 1 share of $1.50 million par value each; issued 2026: 1 share; 2025: 1 share)	2	2
Additional paid-in capital	7,275	7,286
Retained earnings	442	18
Accumulated other comprehensive loss	(130)	(213)
Total Qnity equity	7,591	7,095
Noncontrolling interests	298	271
Total equity	7,889	7,366
Total Liabilities and Equity	$ 14,717	$ 14,070

Assets, Noncurrent, Excluding Noncurrent Investments And Property, Plant, And Equipment [Abstract]

No definition available.

Name:	q_AssetsNoncurrentExcludingNoncurrentInvestmentsAndPropertyPlantAndEquipmentAbstract
Namespace Prefix:	q_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).