Share-Based Compensation (RSU Activity) (Details) - RSUs - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Estimated Forfeiture Rate Non Officers	6.14%
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 10 months 24 days
RSUs (Number of Shares):
Nonvested at beginning of period	1,701
Vested	(632)	(576)	(634)
Forfeited and expired	(255)
Granted	1,229
Nonvested at end of period	2,043	1,701
Vested and expected to vest at end of period	1,894
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 29
Weighted Average Grant Date Fair Value (in dollars per share):
Nonvested at beginning of period	$ 23.22
Vested	23.04
Forfeited and expired	24.32
Granted	22.33
Nonvested at end of period	22.60	$ 23.22
Vested and expected to vest at end of period	$ 22.68
Nonvested at end of period, weighted average remaining vesting term	1 year 9 months
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Related To Current Current Year Grants Per Year	$ 26
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Related To Current Current Year Grants Per Year, Weighted Average Period of Amortization	3 years