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Derivative Financial Instruments - Outstanding Foreign Currency Forward Contracts (Detail)
₽ in Millions, € in Millions, ₩ in Millions, ¥ in Millions, £ in Millions, kr in Millions, kr in Millions, R$ in Millions, R in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions
Sep. 30, 2020
USD ($)
Sep. 30, 2020
KRW (₩)
Sep. 30, 2020
NOK (kr)
Sep. 30, 2020
RUB (₽)
Sep. 30, 2020
DKK (kr)
Sep. 30, 2020
BRL (R$)
Sep. 30, 2020
MXN ($)
Sep. 30, 2020
JPY (¥)
Sep. 30, 2020
EUR (€)
Sep. 30, 2020
ZAR (R)
Sep. 30, 2020
SGD ($)
Sep. 30, 2020
GBP (£)
Sep. 30, 2020
CAD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2019
KRW (₩)
Dec. 31, 2019
NOK (kr)
Dec. 31, 2019
RUB (₽)
Dec. 31, 2019
DKK (kr)
Dec. 31, 2019
MXN ($)
Dec. 31, 2019
JPY (¥)
Dec. 31, 2019
EUR (€)
Dec. 31, 2019
ZAR (R)
Dec. 31, 2019
SGD ($)
Dec. 31, 2019
GBP (£)
Dec. 31, 2019
CAD ($)
Forward Contracts [Member]                                                  
Derivative [Line Items]                                                  
Foreign currency, Cash flow hedging $ 411 ₩ 17,600 kr 4,210 ₽ 1,164 kr 885 R$ 768 $ 444 ¥ 341 € 185 R 124 $ 36 £ 18 $ 1 $ 686 ₩ 17,600 kr 5,377 ₽ 1,012 kr 21 $ 115 ¥ 36 € 188 R 124 $ 42 £ 20 $ 3