Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Valuation allowance for deferred tax assets	$ (1,470)
Deferred tax liabilities:
Investments in foreign subsidiaries	210
Net deferred tax liabilities	(59)	$ (47)
Reportable Legal Entities [Member]
Deferred tax assets:
U.S. Federal net operating loss carryforward and other credits	454	294
State net operating loss carryforward and other credits	196	248
Non-U.S. net operating losses	233	189
Accounts receivable basis difference	114	161
Partnership investments	75	153
Depreciation and amortization	115	64
Disallowed interest	108	51
Pension liability	49	49
Accrued liabilities for incentive compensation	20	32
Contract revenue and cost/long-term contracts	69	17
Insurance and legal reserves	20	17
Operating lease liability	66
Other	20	32
Total deferred tax assets	1,539	1,307
Valuation allowance for deferred tax assets	(1,472)	(1,307)
Deferred tax assets	67
Deferred tax liabilities:
Investments in foreign subsidiaries	38	33
Depreciation and amortization	15	7
Pension liability	2
Right of use assets	67
Other	4	7
Total deferred tax liabilities	126	47
Net deferred tax liabilities	$ (59)	$ (47)