Condensed Consolidated Statement of Cash Flows - USD ($) shares in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities:
Net income attributable to the controlling and noncontrolling interests	$ 796	$ 969
Income from discontinued operations, net of tax	(3)	(3)
Income from continuing operations	793	966
Adjustments to reconcile net income to cash from operations:
Depreciation and amortization	384	377
Pension expense	29	38
Debt extinguishment charge	7	0
Environmental remediation charges	12	61
Business restructuring, net	172	175
Stock-based compensation expense	29	28
Equity affiliate income, net of dividends	(2)	(4)
Deferred income taxes	4	(26)
Cash contributions to pension plans	(7)	(8)
Cash used for restructuring actions	(98)	(35)
Change in certain asset and liability accounts (net of acquisitions):
Receivables	(63)	(188)
Inventories	36	(49)
Other current assets	26	(70)
Accounts payable and accrued liabilities	(23)	35
Taxes and interest payable	(72)	59
Noncurrent assets and liabilities, net	19	(52)
Other	(87)	(40)
Cash from operating activities - continuing operations	1,163	1,275
Cash from/(used for) operating activities - discontinued operations	1	(4)
Cash from operating activities	1,164	1,271
Investing activities:
Capital expenditures	(170)	(224)
Business acquisitions, net of cash balances acquired	(45)	(564)
Payments for the settlement of cross currency swap contracts	(5)	(8)
Proceeds from the settlement of cross currency swap contracts	21	26
Other	8	22
Cash used for investing activities	(191)	(748)
Financing activities:
Net change in borrowing with maturities of three months or less	(7)	6
Proceeds on commercial paper and short-term debt, net of payments	1,397	0
Repayment of Term Loan	(1,000)	0
Proceeds from revolving credit facility	800	0
Repayment of revolving credit facility	(800)	0
Proceeds from the issuance of debt, net of discounts and fees	415	595
Repayment of long-term debt	(503)	(3)
Repayment of acquired debt	12	23
Purchase of treasury stock	0	(175)
Issuance of treasury stock	23	32
Dividends paid on PPG common stock	(368)	(347)
Payments related to tax withholding on stock-based compensation awards	(11)	(15)
Other	(39)	(29)
Cash (used for)/from financing activities	(105)	41
Effect of currency exchange rate changes on cash and cash equivalents	(76)	(34)
Net increase in cash and cash equivalents	792	530
Cash and cash equivalents, beginning of period	1,216	902
Cash and cash equivalents, end of period	2,008	1,432
Interest paid, net of amount capitalized	121	93
Taxes paid, net of refunds	$ 293	$ 282
Reissuance of common stock for business acquisition	0	164