Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating activities:
Net income attributable to the controlling and noncontrolling interests	$ 770	$ 469
Adjustments to reconcile net income to cash from operations:
Depreciation and amortization	266	286
Pension settlement charge	190	0
Impairment and other related charges, net	0	230
Stock-based compensation expense	34	18
Deferred income taxes	(112)	(95)
Cash used for restructuring actions	(29)	(52)
Change in certain asset and liability accounts (net of acquisitions):
Receivables	(528)	(792)
Inventories	(176)	(437)
Other current assets	(61)	(83)
Accounts payable and accrued liabilities	156	417
Taxes and interest payable	51	33
Noncurrent assets and liabilities, net	(77)	(25)
Other	137	(107)
Cash from/(used for) operating activities	621	(136)
Investing activities:
Capital expenditures	(242)	(264)
Business acquisitions, net of cash balances acquired	(106)	(43)
Proceeds from asset sales	0	116
Proceeds from the settlement of cross currency swap contracts	52	18
Other	6	23
Cash used for investing activities	(290)	(150)
Financing activities:
Net proceeds from/(payments on) commercial paper and short-term debt	100	(440)
Net change in borrowing with maturities of three months or less	(12)	15
Proceeds from Term Loan	550	0
Repayment of Term Loan	(300)	0
Proceeds from the issuance of debt, net of discounts and fees	0	1,116
Repayment of long-term debt	300	0
Purchase of treasury stock	0	(175)
Dividends paid on PPG common stock	(292)	(279)
Other	(12)	(24)
Cash (used for)/from financing activities	(266)	213
Effect of currency exchange rate changes on cash and cash equivalents	64	(1)
Net increase/(decrease) in cash and cash equivalents	129	(74)
Cash and cash equivalents, beginning of period	1,099	1,005
Cash and cash equivalents, end of period	1,228	931
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Interest paid, net of amount capitalized	130	69
Taxes paid, net of refunds	270	214
Capital expenditures accrued within Accounts payable and accrued liabilities at period-end	73	51
Purchases of treasury stock transacted but not yet settled	$ 0	$ 15