Debt (Schedule of Line of Credit Facilities) (Details) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 928
Syndicated Credit Facility $850 Million [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		850
Long-term Line of Credit	[1]	$ 1	$ 21
Line of Credit Facility, Interest Rate Description		Senior unsecured long-term debt rating
Credit Facility 100 Million [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 100
Long-term Line of Credit	[1]	$ 97	51
Line of Credit Facility, Interest Rate Description		Fixed
Foreign Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[2]	$ 3
Long-term Line of Credit	[1],[2]	$ 3	80
Line of Credit Facility, Interest Rate Description	[2]	Fixed
Syndicated Credit Facility $500 Million [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 500
Long-term Line of Credit	[1]	$ 346	376
Line of Credit Facility, Interest Rate Description		Debt rating and utilization %
Credit Facility 100 Million (2024)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 100
Long-term Line of Credit	[1]	$ 30	40
Line of Credit Facility, Interest Rate Description		Fixed
Credit Facility 125 Million
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 125
Long-term Line of Credit	[1]	$ 103	108
Line of Credit Facility, Interest Rate Description		Fixed
Credit Facility 100 Million (2025)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 100
Long-term Line of Credit	[1]	$ 70	$ 70
Line of Credit Facility, Interest Rate Description		Fixed

[1] Represents issued but undrawn letters of credit. There was no cash borrowed for the periods presented.

[2] Foreign currency denominated facility, amounts presented are in U.S. dollars.