Capital and Operating Leases (Future Minimum Lease Payments under Non-Cancelable Leases) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Capital Leases of Lessee [Abstract]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	$ 8
Capital Leases, Future Minimum Payments Due in Two Years	8
Capital Leases, Future Minimum Payments Due in Three Years	3
Capital Leases, Future Minimum Payments Due in Four Years	0
Capital Leases, Future Minimum Payments Due in Five Years	0
Capital Leases, Future Minimum Payments Due Thereafter	0
Capital Leases, Future Minimum Payments Due	19
Capital Leases, Less imputed interest	1
Capital Leases, Present value of net minimum lease payments	18
Capital Leases, Less current portion	7
Capital lease obligations	11	12
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	35
Operating Leases, Future Minimum Payments Due in Two Years	31
Operating Leases, Future Minimum Payments, Due in Two Years	27
Operating Leases, Future Minimum Payments, Due in Four Years	25
Operating Leases, Future Minimum Payments, Due in Five Years	20
Operating Leases, Future Minimum Payments, Due Thereafter	92
Operating Leases, Future Minimum Payments Due	$ 230