SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS 2 (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Valuation And Qualifying Accounts Deferred Tax Assets Disclosure [Line Items]
Balance at end of period,	$ 614	$ 598	$ 58
Deferred Tax Assets Valuation Allowance [Member]
Valuation And Qualifying Accounts Deferred Tax Assets Disclosure [Line Items]
Balance at beginning of period,	598	591	636
Additions charged to income tax expense	103	72	109
Reductions credited to income tax expense	(54)	(54)	(152)
Additions (reductions) to equity	(8)	12	(13)
Additions (reductions) due to capital loss carryforwards	(27)	14	(5)
Reductions due to expiring NOLs		(2)	(8)
Additions charged (reductions credited) to goodwill	2	(35)	24
Balance at end of period,	614	598	591
Allowance for Doubtful Accounts [Member]
Valuation And Qualifying Accounts Deferred Tax Assets Disclosure [Line Items]
Additions charged to income tax expense	$ 110	$ 117	$ 81