Annual report pursuant to Section 13 and 15(d)

Basis of Presentation - Computation of Basic and Diluted Earnings Per Share (Detail)

v3.20.4
Basis of Presentation - Computation of Basic and Diluted Earnings Per Share (Detail) - shares
shares in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Earnings Per Share [Abstract]      
Weighted-average shares used in basic computations 131.5 137.4 140.2
Dilutive effect of exercise of equity grants outstanding 3.0 3.5 6.3
Dilutive effect of 2019 Convertible Notes   0.7 3.0
Weighted-average shares used in diluted computations 134.5 141.6 149.5