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Inventories - Summary of Inventories (Detail) - RUB (₽)
₽ in Millions
Dec. 31, 2018
Dec. 31, 2017
Inventories [abstract]    
Raw materials ₽ 14,980 ₽ 15,050
Work in progress 8,681 6,990
Finished goods and goods for resale 19,762 15,950
Total inventories at the lower of cost and net realisable value ₽ 43,423 ₽ 37,990