Benefit Plans (Fair Value of Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	$ 883	$ 911	$ 1,218
UNITED STATES | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	5	5
UNITED STATES | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	878	906
UNITED STATES | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	0	0
UNITED STATES | Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	685	704
UNITED STATES | Mutual funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	0	0
UNITED STATES | Mutual funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	685	704
UNITED STATES | Mutual funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	0	0
UNITED STATES | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	5	5
UNITED STATES | Cash and Cash Equivalents [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	5	5
UNITED STATES | Cash and Cash Equivalents [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	0	0
UNITED STATES | Cash and Cash Equivalents [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	0	0
UNITED STATES | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	193	202
UNITED STATES | Equity Funds [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	0	0
UNITED STATES | Equity Funds [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	193	202
UNITED STATES | Equity Funds [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	0	0
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	$ 127	$ 114	$ 106