Summary of Operating Loss, Capital Loss and General Business Credit Carryforwards (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)
U.S. Federal
Income Taxes [Line Items]
Net operating loss	$ 835
Net operating losses, Expiration	None
U.S. State
Income Taxes [Line Items]
Net operating loss	$ 1,160
Net operating losses, Expiration	Various
Foreign Tax Authority | Brazil
Income Taxes [Line Items]
Net operating loss	$ 17
Net operating losses, Expiration	None
Foreign Tax Authority | Canada
Income Taxes [Line Items]
Net operating loss	$ 21
Net operating losses, Expiration	Through 2041
Capital Loss Carryover | U.S. Federal and State
Income Taxes [Line Items]
Tax credit carryforward, amount	$ 34
Net operating losses, Expiration	2023
Capital Loss Carryover | Foreign Tax Authority | Canada
Income Taxes [Line Items]
Tax credit carryforward, amount	$ 5
Net operating losses, Expiration	None