STOCK-BASED COMPENSATION (Detail) (USD $) | | | | | | | |
In Millions, except Share data, unless otherwise specified | 3 Months Ended
Dec. 31, 2010
| 3 Months Ended
Sep. 30, 2010
| 3 Months Ended
Jun. 30, 2010
| 3 Months Ended
Mar. 31, 2010
| 12 Months Ended
Dec. 31, 2011
| 48 Months Ended
Dec. 31, 2015
| Dec. 31, 2009
|
Stock option rollforward elements | | | | | | | |
Outstanding at beginning of year | | | 40,190,756 | 39,269,159 | | | |
Exercised | | | | (1,707,372) | | | |
Forfeited | | | | (197,200) | | | |
Expired | | | | (27,178) | | | |
Outstanding at end of period | | | | 40,190,756 | | | 39,269,159 |
Exercisable at end of period | | | | 21,714,306 | | | |
Weighted-average exercise price of options outstanding at beginning of year (in dollars per option) | | | 39.37 | 38.1 | | | |
Weighted-average exercise price of options exercised (in dollars per option) | | | | 26.55 | | | |
Weighted-average exercise price of options forfeited (in dollars per option) | | | | 44.81 | | | |
Weighted-average exercise price of options expired (in dollars per option) | | | | 57.06 | | | |
Weighted-average exercise price of options outstanding at end of period (in dollars per option) | | | | 39.37 | | | 38.1 |
Weighted-average exercise price of options exercisable at end of period (in dollars per option) | | | | 34.03 | | | |
Nonvested restricted shares and restricted stock units rollforward | | | | | | | |
Weighted-average fair value of nonvested restricted shares and restricted stock units at beginning of year (in dollars per share) | | | 46.78 | 46.19 | | | |
Weighted-average fair value of restricted shares and restricted stock units granted to employees (in dollars per share) | | | | 49.63 | | | |
Weighted-average fair value of restricted shares and restricted stock units vested (in dollars per share) | | | | 49.89 | | | |
Weighted-average fair value of restricted shares and restricted stock units forfeited (in dollars per share) | | | | 46.87 | | | |
Weighted-average fair value of nonvested restricted shares and restricted stock units at end of year (in dollars per share) | | | | 46.78 | | | 46.19 |
Future stock-based compensation expense | | | | | | | |
Future stock-based compensation to be recognized | 16.5 | 21.4 | $22 | | 51.7 | 47.2 | |
Total | | | | 158.8 | | | |
Restricted shares [Member] | | | | | | | |
Nonvested restricted shares and restricted stock units rollforward | | | | | | | |
Nonvested at beginning of year | | | 709,344 | 587,919 | | | |
Granted to employees | | | | 122,050 | | | |
Vested | | | | (625) | | | |
Nonvested at end of period | | | | 709,344 | | | 587,919 |
Restricted stock units [Member] | | | | | | | |
Nonvested restricted shares and restricted stock units rollforward | | | | | | | |
Nonvested at beginning of year | | | 365,326 | 310,951 | | | |
Granted to employees | | | | 64,125 | | | |
Vested | | | | (1,250) | | | |
Forfeited | | | | (8,500) | | | |
Nonvested at end of period | | | | 365,326 | | | 310,951 |
Semiannual grants [Member] | | | | | | | |
Stock option rollforward elements | | | | | | | |
Grants | | | | 2,820,750 | | | |
Weighted-average exercise price of option grants (in dollars per option) | | | | 49.6 | | | |
Reload grants [Member] | | | | | | | |
Stock option rollforward elements | | | | | | | |
Grants | | | | 32,597 | | | |
Weighted-average exercise price of option grants (in dollars per option) | | | | 53.97 | | | |