Commitments and Contingencies (Detail)	9 Months Ended
	Sep. 30, 2021 legal_matter
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Approximate number of federal district court actions alleged for patent infringement	20
Guarantee obligations, term	30 years
Payment Guarantee
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Guarantee obligations, term	15 years