Supplementary Stockholders' Equity Information, Changes in Accumulated Other Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	Total	Net Foreign Currency Translation Adjustment	Defined Benefit Pension Plans
Balance at Dec. 31, 2012	$ 26	$ 56	$ (30)
Change In Accumulated Other Comprehensive Income (Loss)
Other comprehensive loss before reclassifications	(53)	(44)	(9)
Amounts reclassified from accumulated other comprehensive loss	1	0	1
Balance at Mar. 31, 2013	(26)	12	(38)
Change In Accumulated Other Comprehensive Income (Loss)
Other comprehensive loss before reclassifications	(12)	(12)	0
Amounts reclassified from accumulated other comprehensive loss	1	0	1
Balance at Jun. 30, 2013	(37)	0	(37)
Change In Accumulated Other Comprehensive Income (Loss)
Other comprehensive loss before reclassifications	41	41	0
Amounts reclassified from accumulated other comprehensive loss	1	0	1
Balance at Sep. 30, 2013	$ 5	$ 41	$ (36)