Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Consolidated Balance Sheets
Property, plant and equipment, accumulated depreciation (in dollars)	$ 2,868	$ 2,776
Other intangible assets, accumulated amortization (in dollars)	$ 56	$ 49
Preferred stock, authorized shares	25,000,000	25,000,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, issued shares	0	0
Common stock, authorized shares	200,000,000	200,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued	77,810,875	77,672,670
Treasury stock, shares	2,962,486	3,361,180