Income Taxes - Summary of Net Operating Loss, Valuation Allowance and Expiration Dates (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)
Income Tax Contingency [Line Items]
Valuation allowance	$ (1,300)
Non-U.S. [Member]
Income Tax Contingency [Line Items]
Net operating loss DTAs	189
Valuation allowance	$ (189)
Non-U.S. [Member] | Minimum [Member]
Income Tax Contingency [Line Items]
Expiration	2019
Non-U.S. [Member] | Maximum [Member]
Income Tax Contingency [Line Items]
Expiration	2021
U.S. [Member]
Income Tax Contingency [Line Items]
Net operating loss DTAs	$ 211
Valuation allowance	$ (211)
U.S. [Member] | Minimum [Member]
Income Tax Contingency [Line Items]
Expiration	2030
U.S. [Member] | Maximum [Member]
Income Tax Contingency [Line Items]
Expiration	2037
State [Member]
Income Tax Contingency [Line Items]
Net operating loss DTAs	$ 243
Valuation allowance	$ (243)
State [Member] | Minimum [Member]
Income Tax Contingency [Line Items]
Expiration	2019
State [Member] | Maximum [Member]
Income Tax Contingency [Line Items]
Expiration	2038