Income Tax (Reconciliation of Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits
Balance at January 1,	$ 163	$ 272	$ 256
Additions for tax positions of prior years	42	19	16
Reductions for tax positions of prior years (1)	(93)	(112)	(1)
Additions for tax positions of current year	22	5	12
Reductions for tax positions of current year	(3)	(18)	0
Settlements with tax authorities	(2)	(3)	(1)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	0	0	(10)
Balance at December 31,	129	163	272
Unrecognized tax benefits that, if recognized, would impact the effective rate	$ 80	$ 103	$ 203