SHAREHOLDERS' INTEREST - Additional Information (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended								3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011 Stock Repurchase Plan 2008	Dec. 31, 2013 Stock Repurchase Plan 2011	Dec. 31, 2011 Stock Repurchase Plan 2011	Dec. 31, 2013 Preferred shares	Dec. 31, 2012 Preferred shares	Jun. 30, 2013 6.375 percent Mandatory Convertible Preference Shares, Series A Rate	Dec. 31, 2013 6.375 percent Mandatory Convertible Preference Shares, Series A	Dec. 31, 2012 6.375 percent Mandatory Convertible Preference Shares, Series A	Jun. 30, 2013 Minimum 6.375 percent Mandatory Convertible Preference Shares, Series A	Jun. 30, 2013 Maximum 6.375 percent Mandatory Convertible Preference Shares, Series A
Class of Stock [Line Items]
Preferred shares, outstanding							0	0		13,800,000	0
Preferred shares, authorized							7,000,000			40,000,000	40,000,000
Preferred shares, par value							$ 1		$ 1.00	$ 1.00	$ 1.00
New shares issued	33,350,000	0	0						13,800,000
Preference shares, liquidation preference									$ 50.00	$ 50.00	$ 0.00
Net proceeds from issuance of preference shares									$ 669
Preference shares, dividend rate									6.375%
Preference shares, shares that will be issued upon conversion												1.5015	1.8018
Stock repurchase program, shares repurchased	0	0	2,290,000	1,199,800		1,089,824
Stock repurchase program, shares repurchased value				20		17
Stock repurchase program, authorized repurchase amount						250
Stock repurchase program, remaining authorized repurchase amount					$ 233