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Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) country | Mar. 31, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Dec. 31, 2020 USD ($) country reportingUnit segment | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Jan. 01, 2019 USD ($) | Dec. 31, 2017 USD ($)
Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Number of countries In which entity products are sold (in countries) | country | 200 |  |  |  | 200 |  |  |  |
Number of reportable segments (in segments) | segment |  |  |  |  | 5 |  |  |  |
Tax benefit, after-tax adjustment |  |  |  |  |  | $ 10,000,000 |  |  |
Net tax benefit, prior period adjustment of tax payables and receivables |  |  |  |  |  | 21,000,000 |  |  |
Net tax charge, correction of intangible impairment charges and gain (loss) on disposal calculations |  |  |  |  |  | 8,000,000 |  |  |
Asset impairment charges |  | $ 1,500,000,000 |  |  | $ 1,503,000,000 | 1,223,000,000 | $ 8,337,000,000 |  |
Operating cash flow |  |  |  |  | 1,432,000,000 | 1,044,000,000 | 680,000,000 |  |
Income attributable to non-controlling interests |  |  |  |  | $ 1,000,000 | 2,000,000 | 2,000,000 |  |
Number of reporting units (in reporting units) | reportingUnit |  |  |  |  | 8 |  |  |  |
Proceeds from sale and collection of receivables |  |  | $ 200,000,000 |  |  |  |  |  |
Factored receivables | $ 350,000,000 |  |  |  |  |  |  |  |
Advertising expense |  |  |  |  | $ 362,000,000 | 389,000,000 | 397,000,000 |  |
Research and development expense |  |  |  |  | 144,000,000 | 149,000,000 | 151,000,000 |  |
Operating lease assets | 530,000,000 |  |  |  | 530,000,000 | 615,000,000 |  | $ 664,000,000 |
Present value of lease liabilities | $ 601,000,000 |  |  |  | $ 601,000,000 |  |  | $ 725,000,000 |
Reclassification from AOCL to retained earnings |  |  |  | $ (63,000,000) |  |  |  |  |
Fire Angel Safety Technology Group PLC |  |  |  |  |  |  |  |  |
Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Investment owned, percentage | 23.40% |  |  |  | 23.40% |  |  |  |
Other than temporary impairment, equity method investment |  |  |  |  |  | 12,000,000 |  |  |
Equity method investments | $ 3,000,000 |  |  |  | $ 3,000,000 | 4,000,000 |  |  |
Revenue from related parties |  |  |  |  | 0 | 0 | 8,000,000 |  |
Continuing Operations |  |  |  |  |  |  |  |  |
Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Tax benefit, after-tax adjustment |  |  |  |  |  | 6,000,000 |  |  |
Net tax benefit, prior period adjustment of tax payables and receivables |  |  |  |  |  | 10,000,000 |  |  |
Net tax charge, correction of intangible impairment charges and gain (loss) on disposal calculations |  |  |  |  |  | 2,000,000 |  |  |
Net tax charge, correction of out-of-period adjustments |  |  |  |  |  | 3,000,000 |  |  |
Discontinued Operations |  |  |  |  |  |  |  |  |
Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Tax benefit, after-tax adjustment |  |  |  |  |  | 4,000,000 |  |  |
Net tax benefit, prior period adjustment of tax payables and receivables |  |  |  |  |  | 11,000,000 |  |  |
Net tax charge, correction of intangible impairment charges and gain (loss) on disposal calculations |  |  |  |  |  | 6,000,000 |  |  |
Reserve for Doubtful Accounts |  |  |  |  |  |  |  |  |
Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Valuation allowances and reserves | $ 36,000,000 |  |  |  | $ 36,000,000 | $ 29,000,000 | $ 27,000,000 |  | $ 33,000,000
Minimum |  |  |  |  |  |  |  |  |
Basis of Presentation and Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |
Number of countries in which entity operates (in countries) | country | 40 |  |  |  | 40 |  |  |  |

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