Quarterly report pursuant to Section 13 or 15(d)

Summary of activity under all share-based compensation plans (Detail)

v2.4.0.6
Summary of activity under all share-based compensation plans (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Y
Award Outstanding, Beginning Balance 11,169,000 [1]
Granted, Awards 2,101,000
Exercised, Awards (1,810,000)
Forfeited, Awards (57,000)
Award Outstanding, Ending Balance 11,403,000 [1]
Awards Exercisable, Ending Balance 5,781,000 [2]
Weighted Average Exercise Price Outstanding, Beginning Balance $ 22.54
Granted, Weighted Average Exercise Price $ 45.08
Exercised, Weighted Average Exercise Price $ 10.24
Forfeited, Weighted Average Exercise Price $ 41.60
Weighted Average Exercise Price Outstanding, Ending Balance $ 28.55
Exercisable, Weighted Average Exercise Price, Ending Balance $ 18.14
Weighted Average Remaining Contractual Term Outstanding, Beginning Balance 5.5 [1]
Weighted Average Remaining Contractual Term Outstanding, Ending Balance 6.1 [2]
Exercisable, Weighted Average Remaining Contractual Term, Ending Balance 4.2 [2]
Aggregate Intrinsic Value Outstanding, Beginning balance $ 332.8 [1]
Aggregate Intrinsic Value Outstanding, Ending balance 231.3 [1]
Exercisable, Aggregate Intrinsic Value, Ending Balance $ 170.6 [2]
Outstanding and nonvested at December 31, 2011, Shares 717,600
Granted, shares   
Vested, Shares (330,100)
Forfeited, Shares (400)
Outstanding and nonvested at September 30, 2012, Shares 387,100
Outstanding and nonvested at December 31, 2011, Weighted Average Grant Date Fair Value $ 12.25
Weighted-average grant date fair value of granted   
Vested, Weighted Average Grant Date Fair Value $ 10.64
Forfeited, Weighted Average Grant Date Fair Value $ 6.82
Outstanding and nonvested at September 30, 2012, Weighted Average Grant Date Fair Value $ 13.63
[1] Includes 1.5 million market condition SARs and 0.9 million market and performance condition SARs.
[2] Includes 1.5 million market condition SARs.