Leases (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Leased Assets [Line Items]
Operating Leases, Rent Expense, Net	$ 77	$ 80	$ 90
Operating Leases, Future Minimum Payments Due, Current	64
Operating Leases, Future Minimum Payments, Due in Two Years	51
Operating Leases, Future Minimum Payments, Due in Three Years	43
Operating Leases, Future Minimum Payments, Due in Four Years	29
Operating Leases, Future Minimum Payments, Due in Five Years	25
Operating Leases, Future Minimum Payments, Due Thereafter	42
Operating Leases, Future Minimum Payments Due	$ 254