Consolidated Statement of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss	Total PPG	Non-controlling Interests
Beginning balance at Dec. 31, 2022	$ 6,709	$ 969	$ 1,130	$ 20,828	$ (13,525)	$ (2,810)	$ 6,592	$ 117
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the controlling and noncontrolling interests	1,309			1,270			1,270	39
Other comprehensive loss, net of tax	572					571	571	1
Cash dividends	(598)			(598)			(598)
Purchase of treasury stock	(100)				(100)		(100)
Issuance of treasury stock	83		58		25		83
Stock-based compensation activity	14		14				14
Dividends paid on subsidiary common stock to noncontrolling interests	(21)							(21)
Acquisitions of noncontrolling interests	55							55
Ending balance at Dec. 31, 2023	8,023	969	1,202	21,500	(13,600)	(2,239)	7,832	191
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the controlling and noncontrolling interests	1,149			1,116			1,116	33
Other comprehensive loss, net of tax	(880)					(869)	(869)	(11)
Cash dividends	(622)			(622)			(622)
Purchase of treasury stock	(759)				(759)		(759)
Issuance of treasury stock	67		50		17		67
Stock-based compensation activity	20		20				20
Dividends paid on subsidiary common stock to noncontrolling interests	(25)							(25)
Reductions in noncontrolling interests	(11)							(11)
Ending balance at Dec. 31, 2024	6,962	969	1,272	21,994	(14,342)	(3,108)	6,785	177
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the controlling and noncontrolling interests	1,592			1,576			1,576	16
Other comprehensive loss, net of tax	933					932	932	1
Cash dividends	(628)			(628)			(628)
Purchase of treasury stock	(790)				(790)		(790)
Issuance of treasury stock	52		39		13		52
Stock-based compensation activity	14		14				14
Dividends paid on subsidiary common stock to noncontrolling interests	(23)							(23)
Reductions in noncontrolling interests	(15)							(15)
Ending balance at Dec. 31, 2025	$ 8,097	$ 969	$ 1,325	$ 22,942	$ (15,119)	$ (2,176)	$ 7,941	$ 156