Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating activities
Income from continuing operations	$ 1,309	$ 1,056	$ 1,441
Adjustments to reconcile net income to cash from operations:
Depreciation and amortization	558	554	561
Asbestos-related claims reserve adjustment	0	0	(133)
Impairment and other-related charges, net	160	245	21
Stock-based compensation expense	59	35	57
Deferred income taxes	(183)	(157)	35
Cash contributions to pension plans	(46)	(11)	(10)
Cash used for restructuring actions	(57)	(85)	(77)
Change in certain asset and liability accounts (net of acquisitions):
Receivables	10	(268)	(63)
Inventories	203	(227)	(279)
Other current assets	(53)	(60)	32
Accounts payable and accrued liabilities	130	(8)	295
Noncurrent assets and liabilities, net	(47)	(136)	(109)
Taxes and interest payable	71	143	(64)
Other	107	(118)	(195)
Cash from operating activities	2,411	963	1,562
Investing activities
Capital expenditures	(549)	(518)	(371)
Business acquisitions, net of cash balances acquired	(109)	(114)	(2,137)
Proceeds from asset sales	36	117	47
Other	66	54	57
Cash used for investing activities	(556)	(461)	(2,404)
Financing activities
Proceeds from Term Loan Credit Agreement, net of fees	550	0	1,399
Repayment of Term Loan Credit Agreement	(1,100)	(300)	0
Net (payments on)/proceeds from commercial paper and short-term debt	0	(439)	190
Repayment of Term Loan	0	0	(400)
Proceeds from the issuance of debt, net of discounts and fees	0	1,116	692
Repayment of long-term debt	(300)	0	(847)
Repayment of acquired debt	0	(2)	(207)
Purchase of treasury stock	(86)	(190)	(210)
Dividends paid on PPG common stock	(598)	(570)	(536)
Other	(16)	(24)	12
Cash (used for)/from financing activities	(1,550)	(409)	93
Effect of currency exchange rate changes on cash and cash equivalents	110	1	(72)
Net increase/(decrease) in cash and cash equivalents	415	94	(821)
Cash and cash equivalents, beginning of year	1,099	1,005	1,826
Cash and cash equivalents, end of year	1,514	1,099	1,005
Supplemental disclosures of cash flow information:
Interest paid, net of amount capitalized	213	156	140
Taxes paid, net of refunds	495	452	491
Capital expenditures accrued within Accounts payable and accrued liabilities at year-end	174	76	163
Purchases of treasury stock transacted but not yet settled	14	0	40
Pension settlement charge	$ 190	$ 0	$ 50