Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Operating activities:
Net income attributable to the controlling and noncontrolling interests	$ 946	$ 770
Adjustments to reconcile net income to cash from operations:
Depreciation and amortization	275	266
Pension settlement charge	0	190
Stock-based compensation expense	22	34
Deferred income taxes	(44)	(112)
Cash used for restructuring actions	(27)	(29)
Change in certain asset and liability accounts (net of acquisitions):
Receivables	(638)	(528)
Inventories	(217)	(176)
Other current assets	(43)	(61)
Accounts payable and accrued liabilities	41	156
Taxes and interest payable	(5)	51
Noncurrent assets and liabilities, net	39	(77)
Other	(44)	137
Cash from operating activities	305	621
Investing activities:
Capital expenditures	(374)	(242)
Business acquisitions, net of cash balances acquired	(27)	(106)
Proceeds from the settlement of cross currency swap contracts	10	52
Other	21	6
Cash used for investing activities	(370)	(290)
Financing activities:
Net proceeds from commercial paper and short-term debt	171	100
Net change in borrowing with maturities of three months or less	11	(12)
Proceeds from Term Loan, net of fees	274	550
Repayment of Term Loan Credit Agreement	0	(300)
Repayment of long-term debt	0	300
Purchase of treasury stock	(312)
Dividends paid on PPG common stock	(305)	(292)
Other	(24)	(12)
Cash used for financing activities	(185)	(266)
Effect of currency exchange rate changes on cash and cash equivalents	(133)	64
Net (decrease)/increase in cash and cash equivalents	(383)	129
Cash and cash equivalents, beginning of period	1,514	1,099
Cash and cash equivalents, end of period	1,131	1,228
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Interest paid, net of amount capitalized	134	130
Taxes paid, net of refunds	343	270
Capital expenditures accrued within Accounts payable and accrued liabilities at period-end	$ 73	$ 73