Other Assets and Liabilities - Other Liabilities (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Other Liabilities [Abstract]
Deferred compensation	$ 31	$ 31
Non-current income taxes	37	33
Other non-current liabilities	12	10
Total other non-current liabilities	$ 80	$ 74