Intangible Assets (Amortizable And Unamortizable Intangible Assets) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Amortizable intangible assets:
Total amortizable intangible assets, Cost	$ 453	$ 449
Total amortizable intangible assets, Accumulated Amortization	183	169
Indefinite-Lived Intangible Assets (Including Goodwill) [Abstract]
Goodwill, Gross	778	781
Goodwill, Accumulated Amortization	25	25
Total unamortizable intangible assets, Cost	800	803
Total unamortizable intangible assets, Accumulated Amortization	35	35
Trademarks and trade names
Indefinite-Lived Intangible Assets (Including Goodwill) [Abstract]
Trademarks and trade names, Cost	22	22
Trademarks and trade names, Accumulated Amortization	10	10
Patents
Amortizable intangible assets:
Total amortizable intangible assets, Cost	15	15
Total amortizable intangible assets, Accumulated Amortization	10	10
Licenses
Amortizable intangible assets:
Total amortizable intangible assets, Cost	53	49
Total amortizable intangible assets, Accumulated Amortization	25	23
Customer relationships
Amortizable intangible assets:
Total amortizable intangible assets, Cost	298	299
Total amortizable intangible assets, Accumulated Amortization	98	91
Technical knowledge
Amortizable intangible assets:
Total amortizable intangible assets, Cost	57	57
Total amortizable intangible assets, Accumulated Amortization	24	22
Other
Amortizable intangible assets:
Total amortizable intangible assets, Cost	30	29
Total amortizable intangible assets, Accumulated Amortization	$ 26	$ 23