SHARE-BASED COMPENSATION - Additional Information (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Share-based compensation expense	$ 37	$ 25	$ 24
Number of shares available for future grants under the Plan	11,848,635
Number of shares of stock options and stock appreciation rights an individual may receive in one year	1,327,093
Number of shares of restricted stock, restricted stock units, performance shares, performance share units or other equity grants an individual may receive in one year	540,584
Aggregate number of shares that may be issued for restricted stock, restricted stock units, performance shares, performance share units or other equity grants	9,200,000
Increase in common share if all share-based awards were exercised or vested	38,000,000
Total income tax benefit from share-based awards	9	6	4
Realized excess tax benefits	5	2	0
Number of common shares issued for deferred compensation stock equivalent units	40,899
Number of common shares to be issued for directors who elected common share payments subsequent to year-end	519,281
Number of stock-equivalent units outstanding in deferred compensation accounts	971,650	1,021,977	1,027,768
Performance share units
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Awarded	344,000		0
Performance share units | Minimum
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Final number of shares awarded of each grant's target	0.00%
Performance share units | Maximum
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Final number of shares awarded of each grant's target	150.00%
Total shareholder return ranking in the S&P 500 during the first two years is used to adjust the initial number of units earned up or down	20.00%
Equity-classified share-based compensation arrangements
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Unrecognized share-based compensation cost	42
Unrecognized share-based compensation costs, weighted average period for recognition	1 year 292 days
Liability-classified stock appreciation rights
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Unrecognized share-based compensation cost	$ 1
Unrecognized share-based compensation costs, weighted average period for recognition	1 year 73 days
2012 grants | Performance share units
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Final number of shares awarded of each grant's target	122.00%
Awarded	344,000
2012 grants | Performance share units | Maximum
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Total shareholder return ranking in the S&P 500 during the first two years is used to adjust the initial number of units earned up or down	20.00%
2011 grants | Performance share units
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Final number of shares awarded of each grant's target	105.00%
Total shareholder return ranking in the S&P 500 during the first two years is used to adjust the initial number of units earned up or down	20.00%
Awarded	0