XML 320 R117.htm IDEA: XBRL DOCUMENT v3.10.0.1
Net operating costs (excluding items shown separately) - Summary of net operating costs (excluding items shown separately) (Parenthetical) (Detail)
£ in Millions, $ in Millions
 1 Months Ended 12 Months Ended
Nov. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2017
GBP (£)
Dec. 31, 2016
USD ($)
Disclosure Of Operating Costs [Line Items]          
Operating lease expenses   $ 787.0 $ 555.0   $ 541.0
Purchases of the other investors' share of production   332.0 229.0   383.0
Pre-tax gains on disposals of property, plant and equipment $ 549.0 586.0 138.0   $ 354.0
United Kingdoms Financial Conduct Authority (FCA) [Member]          
Disclosure Of Operating Costs [Line Items]          
Financial penalty     $ 36.4 £ 27.4  
Kitimat [Member]          
Disclosure Of Operating Costs [Line Items]          
Pre-tax gains on disposals of property, plant and equipment   $ 549.0