Commitments and Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract]
Rental expense, net of sublease income	$ 66	$ 65	$ 92
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Future minimum lease obligations for 2014	99
Future minimum lease obligations for 2015	71
Future minimum lease obligations for 2016	56
Future minimum lease obligations for 2017	44
Future minimum lease obligations for 2018	34
Future minimum lease obligations, beyond 2018	187
Purchase Obligation, Fiscal Year Maturity [Abstract]
Total payments expected under purchase arrangements	56
Total payments expected in 2014	49
Total payments expected in 2015	5
Total payments expected in 2016	2
Contractual Obligation	485
Accrued portion of the amount of indemnification under agreements	$ 0