Employment Benefit Plans Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Equity securities exceeding 10 percent of plan assets	two	four
Percent of total assets that equity securities exceeding 10 percent of plan assets represent	10.00%	10.00%
Net pension assets included in other current liabilities	$ 9	$ 12
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	3,080	3,068	$ 2,611
Pension Benefits | Level 1 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	3,048	3,057
Pension Benefits | Level 2 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	32	11
Pension Benefits | Level 3 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	0	0
Pension Benefits | Cash and equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	30	8
Pension Benefits | Cash and equivalents | Level 1 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	0	0
Pension Benefits | Cash and equivalents | Level 2 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	30	8
Pension Benefits | Cash and equivalents | Level 3 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	0	0
Pension Benefits | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	1,709	3,018
Pension Benefits | Equity Securities | Level 1 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	1,709	3,018
Pension Benefits | Equity Securities | Level 2 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	0	0
Pension Benefits | Equity Securities | Level 3 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	0	0
Pension Benefits | Government obligations
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	1,339	39
Pension Benefits | Government obligations | Level 1 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	1,339	39
Pension Benefits | Government obligations | Level 2 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	0	0
Pension Benefits | Government obligations | Level 3 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	0	0
Pension Benefits | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	2	3
Pension Benefits | Other fixed maturity securities | Level 1 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	0	0
Pension Benefits | Other fixed maturity securities | Level 2 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	2	3
Pension Benefits | Other fixed maturity securities | Level 3 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	$ 0	$ 0