Net Deferred Tax Assets (Table) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Deferred Tax Assets
Workers' compensation	$ 150	$ 157
Operating lease liabilities	67	77
Reserves not currently deductible for tax purposes	71	61
Stock compensation	8	7
Net operating losses, tax credit and other carry-forwards	33	35
Capitalized research and development expenses	315	200
Other	11	10
Gross deferred tax asset	655	547
Less valuation allowance	26	29
Net deferred tax assets	629	518
Deferred Tax Liabilities
Depreciation and amortization	457	447
Contract accounting differences	47	78
Purchased intangibles	212	234
Operating lease assets	62	72
Retirement benefits	216	54
Other	13
Gross deferred tax liabilities	1,007	885
Deferred Tax Liabilities, Net	$ (378)	$ (367)

The deferred tax assets relating to state income tax credit carry-forwards (The tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused tax credit carryforwards which have been reduced by a valuation allowance), and the deferred tax assets relating to net operating loss carry-forward (Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards) combined.

No definition available.