Taxation (Reconciliation of Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Tax Contingency [Line Items]
Balance, beginning of year	$ 64	$ 76
Additions based on tax positions related to prior years	4	7
Reductions for settlements with taxing authorities	(1)	(19)
Balance, end of year	$ 67	$ 64