Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating activities:
Net income attributable to the controlling and noncontrolling interests	$ 409	$ 273
Adjustments to reconcile net income to cash (used for)/from operations:
Depreciation and amortization	141	133
Pension settlement charge	0	190
Stock-based compensation expense	12	17
Deferred income taxes	(45)	(131)
Cash used for restructuring actions	(10)	(16)
Change in certain asset and liability accounts (net of acquisitions):
Receivables	(344)	(277)
Inventories	(229)	(308)
Other current assets	(66)	(88)
Accounts payable and accrued liabilities	(10)	175
Taxes and interest payable	88	111
Noncurrent assets and liabilities, net	7	(39)
Other	(13)	45
Cash (used for)/from operating activities	(60)	85
Investing activities:
Capital expenditures	(256)	(120)
Other	17	56
Cash used for investing activities	(239)	(64)
Financing activities:
Net proceeds from commercial paper and short-term debt	0	638
Net change in borrowing with maturities of three months or less	4	190
Proceeds from Term Loan, net of fees	274	0
Repayment of Term Loan Credit Agreement	0	(100)
Repayment of long-term debt	0	300
Purchase of treasury stock	(149)
Dividends paid on PPG common stock	(153)	(146)
Other	(11)	(5)
Cash (used for)/from financing activities	(35)	277
Effect of currency exchange rate changes on cash and cash equivalents	1	29
Net (decrease)/increase in cash and cash equivalents	(333)	327
Cash and cash equivalents, beginning of period	1,514	1,099
Cash and cash equivalents, end of period	1,181	1,426
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Interest paid, net of amount capitalized	66	73
Taxes paid, net of refunds	94	107
Capital expenditures accrued within Accounts payable and accrued liabilities at period-end	49	48
Purchases of treasury stock transacted but not yet settled	$ 15	$ 0