Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	1 Months Ended				12 Months Ended	0 Months Ended
	Oct. 31, 2012	Apr. 30, 2011	Oct. 31, 2008	Feb. 29, 2008	Dec. 31, 2013	Feb. 06, 2014 Subsequent Event [Member]	Feb. 04, 2014 Subsequent Event [Member] Variable Interest Entity, Primary Beneficiary [Member]
Subsequent Event [Line Items]
Common stock, dividends, per share, declared						$ 0.18
Cash dividend						$ 28
Date to be paid						Feb. 28, 2014
Date of record						Feb. 17, 2014
Share repurchase plan, authorized repurchase amount	264	129	100	400	893	400
Stock repurchase plan, remaining authorized repurchase amount					$ 228
Fairway venture term							20 years
Fairway venture renewal term							10 years