Operating Expenses, Depreciation and Amortization - Summary of Depreciation and Amortization Recognized (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Depreciation and amortisation expense [abstract]
Depreciation and amortization expense included in cost of sales	$ 921	$ 865	$ 853
Depreciation and amortization expense included in administrative, selling and distribution and logistics expenses	196	180	129
Depreciation and amortization	$ 1,117	$ 1,045	$ 982

Adjustments for depreciation and amortisation expense to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Depreciation and amortisation expense; Profit (loss)]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2020-01-01
-Paragraph 20
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_20_b&doctype=Standard
-URIDate 2020-01-01

Name:	ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration