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Leases - Additional Information (Detail) $ in Millions | 9 Months Ended
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Sep. 30, 2019 USD ($)
Leases [Line Items] |
Leases, term of description | the leases in effect were related to land, buildings, vehicles, office equipment and other production equipment under operating leases with lease terms of up to 99 years.
Finance lease, weighted average remaining lease term | 2 years 8 months 12 days
Operating lease, weighted average remaining lease term | 17 years 2 months 12 days
Operating lease, weighted average discount rate, percent | 4.53%
Finance lease, weighted average discount rate, percent | 5.14%
Total minimum sublease rentals under noncancelable subleases | $ 3.9
Maximum [Member] |
Leases [Line Items] |
Leases, term of contract | 99 years

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