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Stock-Based Compensation and Other Stock Plans - Summary of Stock Option Activity and Stock-settled SARs (Detail) $ / shares in Units, shares in Thousands, $ in Millions | 6 Months Ended
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Jun. 30, 2018 USD ($) $ / shares shares
Stock Option |
Shares (in thousands) |
Beginning balance (in shares) | shares | 3,198
Granted (in shares) | shares | 515
Exercised (in shares) | shares | (244)
Forfeited or expired (in shares) | shares | (34)
Ending balance (in shares) | shares | 3,435
Exercisable at June 30, 2018 (in shares) | shares | 2,340
Exercise Price Per Share |
Beginning balance (in dollars per share) | $ / shares | $ 115.30
Granted (in dollars per share) | $ / shares | 161.18
Exercised (in dollars per share) | $ / shares | 73.33
Forfeited or expired (in dollars per share) | $ / shares | 159.17
Ending balance (in dollars per share) | $ / shares | 124.72
Exercisable at June 30, 2018 (in dollars per share) | $ / shares | $ 108.26
Additional Disclosures |
Outstanding, remaining contractual term (in years) | 6 years 7 months 6 days
Exercisable, remaining contractual term (in years) | 5 years 6 months
Outstanding, aggregate intrinsic value | $ | $ 128.8
Exercisable, aggregate intrinsic value | $ | $ 124.4
Stock-Settled SARs |
Stock-settled SARs (in thousands) |
Beginning balance (in shares) | shares | 360
Granted (in shares) | shares | 89
Exercised (in shares) | shares | (8)
Forfeited or expired (in shares) | shares | (21)
Ending balance (in shares) | shares | 420
Exercisable at June 30, 2018 (in shares) | shares | 238
Exercise Price Per Share |
Beginning balance (in dollars per share) | $ / shares | $ 138.63
Granted (in dollars per share) | $ / shares | 161.18
Exercised (in dollars per share) | $ / shares | 101.87
Forfeited or expired (in dollars per share) | $ / shares | 131.42
Ending balance (in dollars per share) | $ / shares | 144.43
Exercisable at June 30, 2018 (in dollars per share) | $ / shares | $ 132.55
Additional Disclosures |
Outstanding, remaining contractual term | 7 years 8 months 12 days
Exercisable, remaining contractual term | 6 years 8 months 12 days
Outstanding, aggregate intrinsic value | $ | $ 7.7
Exercisable, aggregate intrinsic value | $ | $ 7.0

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