Condensed Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Operating activities:
Net income attributable to the controlling and noncontrolling interests	$ 327	$ 1,301
Less: Income from discontinued operations	(1)	(1,018)
Income from continuing operations	326	283
Adjustments to reconcile net income to cash (used for) / from operations:
Depreciation and amortization	120	119
Pension expense	24	18
Stock-based compensation expense	15	18
Equity affiliate (earnings) losses, net of distributions received	(6)	7
Deferred income taxes	12	(1)
Cash contributions to pension plans	(276)	(5)
Restructuring cash spending	(13)	(20)
(Gains) / Losses on Derivative Instruments	(55)	(5)
Change in certain asset and liability accounts:
Receivables	(327)	(363)
Inventories	(136)	(178)
Other current assets	(66)	(33)
Accounts payable and accrued liabilities	(63)	235
Noncurrent assets	(37)	(24)
Noncurrent liabilities	4	(29)
Taxes and interest payable	67	12
Other	(18)	96
Cash (used for) / from operating activities - continuing operations	(429)	130
Cash from operating activities - discontinued operations	0	33
Cash (used for) / from operating activities	(429)	163
Investing activities:
Capital expenditures	(72)	(103)
Business acquisitions, net of cash balances acquired	(9)	(22)
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	0	(132)
Proceeds from maturity of short-term investments	51	250
Payments on cross currency swap contracts	(34)	(45)
Proceeds from cross currency swap contracts	19	19
Proceeds from net investment hedges	19	0
Other	14	4
Cash from investing activities - continuing operations	35	1,596
Cash used for investing activities - discontinued operations	0	(1)
Cash from investing activities	35	1,595
Financing activities:
Net change in borrowing with maturities of three months or less	(20)	(10)
Repayment of long-term debt	(1)	(2)
Purchase of treasury stock	(200)	(200)
Issuance of treasury stock	44	35
Dividends paid on PPG common stock	(91)	(85)
Other	(19)	0
Cash from / (used for) financing activities - continuing operations	458	(263)
Cash used for financing activities - discontinued operations	0	(40)
Cash from / (used for) financing activities	458	(303)
Effect of currency exchange rate changes on cash and cash equivalents	(15)	(12)
Net payments on commercial paper and short-term debt	(497)	(3)
Proceeds from the issuance of debt	1,242	2
Net increase in cash and cash equivalents	49	1,443
Cash and cash equivalents, beginning of period	686	1,116
Cash and cash equivalents, end of period	735	2,559
Interest paid, net of amount capitalized	17	53
Taxes paid, net of refunds	$ 83	$ 59