Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating activities:
Net income attributable to controlling and noncontrolling interests	$ 669	$ 1,693
Less: Income from discontinued operations	(1)	(1,011)
Income from continuing operations	668	682
Adjustments to reconcile net income to cash from operations:
Depreciation and amortization	245	234
Pension expense	49	41
Stock-based compensation expense	40	38
Business restructuring	140	0
Equity affiliate (earnings) losses, net of distributions received	(13)	7
Deferred income taxes	(46)	27
Cash contributions to pension plans	(283)	(10)
Restructuring cash spending	(22)	(32)
Change in certain asset and liability accounts:
Receivables	(591)	(531)
Inventories	(80)	(203)
Other current assets	(84)	(75)
Accounts payable and accrued liabilities	20	314
Taxes and interest payable	136	12
Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net	(27)	59
Other	(20)	67
Cash from operating activities - continuing operations	186	512
Cash used for operating activities - discontinued operations	0	(111)
Cash from operating activities	186	401
Investing activities:
Capital expenditures	(162)	(232)
Business acquisitions, net of cash balances acquired	(26)	(24)
Proceeds from the disposition of PPG's interest in the Transitions Optical joint venture and sunlens business	47	1,625
Purchase of short-term investments	(97)	(838)
Proceeds from maturity of short-term investments	107	509
Payments on cross currency swap contracts	(34)	(45)
Proceeds from cross currency swap contracts and foreign currency contracts	38	19
Other	19	9
Cash (used for) / from investing activities - continuing operations	(108)	1,023
Cash used for investing activities - discontinued operations	0	(1)
Cash (used for) / from investing activities	(108)	1,022
Financing activities:
Net change in borrowing with maturities of three months or less	(12)	(16)
Net payments on commercial paper and short-term debt	(432)	0
Proceeds from the issuance of debt	1,242	2
Repayment of long-term debt	(338)	(4)
Purchase of treasury stock	(351)	(300)
Issuance of treasury stock	50	41
Dividends paid on PPG common stock	(189)	(177)
Acquisition of noncontrolling interest	0	(35)
Other	(12)	(17)
Cash used for financing activities - continuing operations	(42)	(506)
Cash used for financing activities - discontinued operations	0	(40)
Cash used for financing activities	(42)	(546)
Effect of currency exchange rate changes on cash and cash equivalents	(15)	(7)
Net increase in cash and cash equivalents	21	870
Cash and cash equivalents, beginning of period	686	1,116
Cash and cash equivalents, end of period	707	1,986
Interest paid, net of amount capitalized	60	106
Taxes paid, net of refunds	$ 158	$ 308