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Impairment, Restructuring Charges and Other Related Closure Costs - Summary of Impairment, Restructuring Charges and Other Related Closure Costs (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Restructuring Cost And Reserve [Line Items] |  |  |
Impairment | $ (7) | $ (2) |
Restructuring charges | 2 | (19) | $ (42)
Other related closure costs |  |  | (3)
Total impairment, restructuring charges and other related closure costs | (5) | (21) | (45)
Set-top Box Restructuring Plan [Member] |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Restructuring charges | 2 | (19) | (34)
Total impairment, restructuring charges and other related closure costs | 2 | (19) | (34)
Long-lived Asset Impairment Charge [Member] |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Impairment | (7) | (2) |
Total impairment, restructuring charges and other related closure costs | $ (7) | $ (2) |
EPS Restructuring Plan [Member] |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Restructuring charges |  |  | 5
Total impairment, restructuring charges and other related closure costs |  |  | 5
$600-650 Million Net Opex Plan [Member] |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Other related closure costs |  |  | (3)
Total impairment, restructuring charges and other related closure costs |  |  | (3)
Other Restructuring Initiatives [Member] |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Restructuring charges |  |  | (13)
Total impairment, restructuring charges and other related closure costs |  |  | $ (13)

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