Borrowings and Lines of Credit (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Debt and Bank Credit Agreements and Leases

Long-term Debt Obligations

($ in millions)	2014		2013
3 7/8% notes, due 2015 (€300)	$	364	$	413
1.9 % notes, due 2016(1)	250		249
7  3/8% notes, due 2016(1)	—		146
6 7/8% notes, due 2017	—		74
3-year variable rate bank loan, due 2017 (€500)	605		—
6.65% notes, due 2018	125		700
7.4% notes, due 2019	—		198
2.3% notes, due 2019	299		—
3.6% notes, due 2020	496		495
9% non-callable debentures, due 2021(1)	133		149
2.70% notes, due 2022	—		400
2.5% note, due 2029 (€80)	96		—
7.70% notes, due 2038	175		249
5.5% notes, due 2040	248		248
3% note, due 2044 (€120)	137		—
Commercial paper	935		—
Impact of derivatives on debt(1)	9		21
Various other non-U.S. debt, weighted average 2.3% as of December 31, 2014 and 0.7% of December 31, 2013.	5		4
Capital lease obligations	33		30
Total	3,910		3,376
Less payments due within one year	366		4
Long-term debt	$	3,544	$	3,372

(1) PPG entered into several interest rate swaps which had the effect of converting fixed rate notes to variable rates, based on the three-month London Interbank Offered Rate (LIBOR). There were no interest rate swaps outstanding related to these instruments as of December 31, 2014 and 2013. The impact of the derivatives on debt represents the fair value adjustment of the debt while the interest rate swaps were outstanding, which is being amortized as a reduction to interest expense over the remaining term of the debt. The weighted average effective interest rate for these borrowings, including the effects of the swaps, was 3.9% and 4.1% for the years ended December 31, 2014 and 2013, respectively. Refer to Note 9 for additional information.

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Minimum lease commitments for operating leases that have initial or remaining lease terms in excess of one year are as follows:

Short-Term Debt Outstanding

Short-term debt outstanding as of December 31, 2014 and 2013, was as follows:

($ in millions)	2014		2013
Various, weighted average 2.52% as of December 31, 2014 and 3.55% as of December 31, 2013	$	115	$	30
Total	$	115	$	30