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Share-Based Payments - LTI Stock Option Plan Executives - Additional Information (Detail) shares in Millions, Unit_pure in Millions | 12 Months Ended
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Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Fair value of stock options granted | $ | $ 0 | $ 7.54 | $ 11.79
Number of shares issued | 1,972.0 | 1,959.0 | 1,957.0
Long Term Incentive Stock Option Plan [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Stock options granted | 0.0 | 38.1 |
Long Term Incentive Stock Option Plan [member] | Executive [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Stock options granted |  | 3.6 |
Fair value of stock options granted | $ |  | $ 287,000,000 |
Long Term Restricted Stock Unit Program One [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Stock options granted |  | 7.0 |
Share based payment vesting period | 5 years |  |
Long Term Restricted Stock Unit Program One [member] | Executive [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Stock options granted | 0.0 | 0.8 |
Fair value of stock options granted | $ |  | $ 307,000,000 |
Long Term Restricted Stock Unit Program Three [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Share based payment vesting period | 5 years |  |
Share-based compensation grant date fair value | 0.1 | 0.1 |
Share-based compensation grant date fair value | $ | $ 7,000,000 | $ 6,000,000 |
Long Term Restricted Stock Unit Program Four [Member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Stock options granted | 0.8 | 1.7 |
Fair value of stock options granted | $ | $ 7,000,000 | $ 120,000,000 |
Restricted Stock Units [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Share-based compensation grant date fair value | 3.9 | 10.9 | 5.5
Share-based compensation grant date fair value | $ | $ 9,000,000 | $ 9,000,000 |
Number of shares issued | 0.2 | 0.2 |
Restricted Stock Units [member] | Management board members and other employees [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Fair value of stock options granted | $ | $ 155,000,000 | $ 116,000,000 |
Number of shares issued | 2.8 | 1.7 |
Restricted Stock Units [member] | Board of Director [Member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of shares issued | 0.2 | 0.1 |

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- Definition The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_47_b&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The number of share options granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -Subparagraph b -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_b_ii&doctype=Standard -URIDate 2021-03-24 + Details
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