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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, $ in Millions, $ in Millions, $ in Millions, $ in Millions
Mar. 31, 2020
USD ($)
Mar. 31, 2020
KRW (₩)
Mar. 31, 2020
NOK (kr)
Mar. 31, 2020
RUB (₽)
Mar. 31, 2020
MXN ($)
Mar. 31, 2020
EUR (€)
Mar. 31, 2020
JPY (¥)
Mar. 31, 2020
ZAR (R)
Mar. 31, 2020
GBP (£)
Mar. 31, 2020
DKK (kr)
Mar. 31, 2020
SGD ($)
Mar. 31, 2020
CAD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2019
KRW (₩)
Dec. 31, 2019
NOK (kr)
Dec. 31, 2019
RUB (₽)
Dec. 31, 2019
MXN ($)
Dec. 31, 2019
EUR (€)
Dec. 31, 2019
JPY (¥)
Dec. 31, 2019
ZAR (R)
Dec. 31, 2019
GBP (£)
Dec. 31, 2019
DKK (kr)
Dec. 31, 2019
SGD ($)
Dec. 31, 2019
CAD ($)
Forward Contracts [Member]                                                
Derivative [Line Items]                                                
Foreign currency, Cash flow hedging $ 536 ₩ 17,600 kr 5,232 ₽ 1,274 $ 458 € 207 ¥ 191 R 124 £ 38 kr 25 $ 18 $ 1 $ 686 ₩ 17,600 kr 5,377 ₽ 1,012 $ 115 € 188 ¥ 36 R 124 £ 20 kr 21 $ 42 $ 3