Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share - Additional Information (Detail)

v3.5.0.2
Earnings Per Share - Additional Information (Detail) - $ / shares
shares in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Equity grants with anti-dilutive effect 13.0 5.4 4.9 7.7
Convertible Debt [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Convertible notes initial conversion price $ 86.28 $ 86.28 $ 86.28 $ 86.28