Taxation (Reconciliation of Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income Tax Contingency [Line Items]
Balance, beginning of year	$ 67	$ 64
Additions based on tax positions related to prior years	9	4
Reductions for settlements with taxing authorities	(3)	(1)
Balance, end of year	$ 73	$ 67