Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating activities
Income from continuing operations	$ 1,377	$ 1,262	$ 1,035
Adjustments to reconcile net income to cash from operations:
Depreciation and amortization	492	514	502
Pension settlement charge	0	190	0
Impairment and other-related charges, net	146	160	231
Stock-based compensation expense	42	56	34
Deferred income taxes	(97)	(187)	(151)
Business restructuring, net	233	(2)	33
Cash contributions to pension plans	(26)	(46)	(11)
Cash used for restructuring actions	(52)	(56)	(85)
Change in certain asset and liability accounts (net of acquisitions):
Receivables	(181)	12	(248)
Inventories	(27)	145	(177)
Other current assets	(30)	(41)	(59)
Accounts payable and accrued liabilities	(259)	151	21
Noncurrent assets and liabilities, net	(73)	(50)	(112)
Taxes and interest payable	(31)	71	143
Other	(123)	115	(156)
Cash from operating activities - continuing operations	1,391	2,294	1,000
Cash from/(used for) operating activities - discontinued operations	29	117	(37)
Cash from operating activities	1,420	2,411	963
Investing activities
Capital expenditures	(721)	(516)	(486)
Business acquisitions, net of cash balances acquired	(31)	(109)	(114)
Proceeds from divestiture of businesses	325	36	117
Other	28	64	53
Cash used for investing activities - continuing operations	(399)	(525)	(430)
Cash from/(used for) investing activities - discontinued operations	506	(31)	(31)
Cash from/(used for) investing activities	107	(556)	(461)
Financing activities
Proceeds from Term Loan Credit Agreement, net of fees	274	550	0
Repayment of Term Loan Credit Agreement	0	(1,100)	(300)
Net payments on commercial paper and short-term debt	0	0	(439)
Proceeds from the issuance of debt, net of discounts and fees	0	0	1,116
Repayment of long-term debt	(300)	(300)	0
Purchase of treasury stock	(752)	(86)	(190)
Dividends paid on PPG common stock	(622)	(598)	(570)
Other	(25)	(16)	(26)
Cash used for financing activities - continuing operations	(1,425)	(1,550)	(409)
Cash used for financing activities - discontinued operations	0	0	0
Cash used for financing activities	(1,425)	(1,550)	(409)
Effect of currency exchange rate changes on cash and cash equivalents	(325)	110	1
Cash reclassified to assets held for sale	0	(5)	(3)
Net (decrease)/increase in cash and cash equivalents	(223)	410	91
Cash and cash equivalents, beginning of year	1,493	1,083	992
Cash and cash equivalents, end of year	1,270	1,493	1,083
Supplemental disclosures of cash flow information:
Interest paid, net of amount capitalized	247	213	156
Taxes paid, net of refunds	653	488	436
Capital expenditures accrued within Accounts payable and accrued liabilities at year-end	160	170	71
Purchases of treasury stock transacted but not yet settled	$ 12	$ 14	$ 0