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Common Stock - Summary of Stock Options (Detail) - $ / shares
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]      
Number of shares under stock option, Beginning of the year 21,005,502 21,310,099 21,009,508
Number of Shares Granted 1,669,511 1,650,262 1,493,576
Number of Shares Forfeited (1,398,052) (1,954,859) (944,917)
Number of Shares Exercised     (248,068)
Number of shares under stock option, End of the year 21,276,961 21,005,502 21,310,099
Number of stock options vested and expected to be vest, exercisable 18,039,330 17,893,434 17,796,607
Weighted Average Exercise Price, Beginning of year $ 45.70 $ 47.68 $ 48.88
Weighted Average Exercise Price, Stock Options Granted 15.00 20.23 28.72
Weighted Average Exercise Price, Stock Options Forfeited 63.65 45.75 50.57
Weighted Average Exercise Price, Stock Options Exercised     29.70
Weighted Average Exercise Price, End of the year 42.09 45.70 47.68
Weighted Average Exercise Price, Stock Options Exercisable $ 46.27 $ 49.25 $ 50.49