Employment Benefit Plans Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Equity securities exceeding 10 percent of plan assets	four	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	$ 12	$ 11
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	3,068	2,611	$ 2,355
Pension Benefits | Level 1 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	3,057	2,596
Pension Benefits | Level 2 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	11	15
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	8	11
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	8	11
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	3,018	2,448
Pension Benefits | Equity Securities | Level 1 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	3,018	2,448
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	39	148
Pension Benefits | Government obligations | Level 1 Inputs
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets Excluding Accrued Dividend And Interest Receivable	39	148
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	3	4
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	3	4
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