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Net Loss Per Share - Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class A Common Stock and Class C Capital Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total Class A common stock and Class C capital stock equivalents (in shares)	61,066	58,631	26,791
Class A Common Stock and Class C Capital Stock \| Weighted average \| Option Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total Class A common stock and Class C capital stock equivalents (in shares)	17,996	25,913	19,183
Class A Common Stock and Class C Capital Stock \| Weighted average \| Restricted Stock Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total Class A common stock and Class C capital stock equivalents (in shares)	6,530	8,198	6,765
1.375% convertible senior notes due 2026 \| Convertible Debt
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion Spread (in shares)	11,464
Conversion price per share (usd per share)	$ 43.51
2.75% convertible senior notes due 2025 \| Convertible Debt
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion Spread (in shares)	8,408
Conversion price per share (usd per share)	$ 67.20
0.75% convertible senior notes due 2024 \| Convertible Debt
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion Spread (in shares)	13,983
Conversion price per share (usd per share)	$ 43.51
Class A common stock issuable upon conversion of the convertible notes maturing in 2020 \| Class A Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total Class A common stock and Class C capital stock equivalents (in shares)	0	338	404
Class C capital stock issuable upon conversion of the convertible notes maturing in 2021, 2023, 2024, 2025 and 2026 \| Class C Capital Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total Class A common stock and Class C capital stock equivalents (in shares)	36,540	24,182	439