Intangible Assets (Amortizable And Unamortizable Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Intangible Assets [Line Items]
Total amortizable intangible assets, Cost	$ 385	$ 393
Total amortizable intangible assets, Accumulated Amortization	134	123
Goodwill, Cost	671	691
Total unamortizable intangible assets, Cost	717	737
Total unamortizable intangible assets, Accumulated Amortization	34	34
Goodwill [Member]
Intangible Assets [Line Items]
Goodwill, Accumulated Amortization	26	26
Goodwill, Gross	697	717
Trademarks And Trade Names [Member]
Intangible Assets [Line Items]
Trademarks and trade names, Cost	20	20
Trademark Indefinite-lived Intangible Assets, Accumulated Amortization	8	8
Patents [Member]
Intangible Assets [Line Items]
Total amortizable intangible assets, Cost	15	14
Total amortizable intangible assets, Accumulated Amortization	9	8
Licenses [Member]
Intangible Assets [Line Items]
Total amortizable intangible assets, Cost	47	47
Total amortizable intangible assets, Accumulated Amortization	19	17
Customer Relationships [Member]
Intangible Assets [Line Items]
Total amortizable intangible assets, Cost	248	255
Total amortizable intangible assets, Accumulated Amortization	67	61
Technical Knowledge [Member]
Intangible Assets [Line Items]
Total amortizable intangible assets, Cost	47	48
Total amortizable intangible assets, Accumulated Amortization	17	15
Other [Member]
Intangible Assets [Line Items]
Total amortizable intangible assets, Cost	28	29
Total amortizable intangible assets, Accumulated Amortization	$ 22	$ 22