Shareholders' Equity (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Repurchase Of Shares Of Common Stock [Line Items]
Stock Repurchased During Period, Shares	[1]	10,083,000	12,981,000	2,419,000
Value of share repurchases with trade dates during the current reporting date but with settlement dates subsequent to the current reporting date.			$ 11	$ 11
Number of shares repurchased with trade dates during the current reporting date but with settlement dates subsequent to the current reporting date.			100,000	100,000
Stock Repurchased During Period, Value	[1]	$ 1,200	$ 1,580	$ 250
Common Stock
Repurchase Of Shares Of Common Stock [Line Items]
Stock Repurchased During Period, Shares		10,000,000	13,000,000	2,000,000
Stock Repurchased During Period, Value		$ 69	$ 31	$ 71
May 2021
Repurchase Of Shares Of Common Stock [Line Items]
Stock Repurchased During Period, Shares		8,116,000	8,235,000	0
Stock Repurchased During Period, Value		$ 950	$ 1,050	$ 0
November 2019 [Member]
Repurchase Of Shares Of Common Stock [Line Items]
Stock Repurchased During Period, Shares		0	4,746,000	2,419,000
Stock Repurchased During Period, Value		$ 0	$ 530	$ 250
May 2021
Repurchase Of Shares Of Common Stock [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount		1,750
September 2022
Repurchase Of Shares Of Common Stock [Line Items]
Stock Repurchased During Period, Value		250
Stock Repurchase Program, Authorized Amount		$ 2,000
September 2022 | Common Stock
Repurchase Of Shares Of Common Stock [Line Items]
Stock Repurchased During Period, Shares		1,967,000	0	0

[1] 2021 amount excludes and 2020 amount includes the effect of $11 million in share repurchases (0.1 million shares) with trade dates on, or prior to, December 31, 2020, but settlement dates subsequent to December 31, 2020.