INCOME TAXES - Effective Income Tax Rate Applicable to Continuing Operations (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
U.S. federal statutory income tax	$ 152	$ 154	$ 90
State income taxes, net of federal tax benefit	13	6	4
REIT income not subject to federal income tax	(101)	(94)	(80)
Foreign taxes	(8)	8	20
Provision for unrecognized tax benefits	(193)	(6)	(7)
Repatriation of Canadian earnings	21	0	(76)
State income tax settlement	0	(10)	0
Domestic production activities deduction	(13)	0	0
Other, net	0	(3)	(13)
Total income tax provision (benefit)	$ (129)	$ 55	$ (62)
Effective income tax rate	(29.90%)	12.50%	(23.30%)