Stockholder's Equity (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Feb. 22, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Nov. 04, 2021	Sep. 30, 2001
Common Stock Activity [Line Items]
An aggregate maximum of shares of common stock authorized for repurchase (in shares)						10,000,000
Stock repurchase program, authorized amount					$ 5,000
Stock repurchased during period, shares		8,600,000
Stock repurchased during period, value		$ 971
Stock repurchase program, remaining authorized repurchase amount		4,000
Estimated federal excise taxes		$ 8
Common stock dividends declared (in USD per share)		$ 5.8850	$ 8.8750	$ 4.9875
Series E Preferred stock, shares issued (in shares)		0
Series E Preferred stock, shares outstanding (in shares)		0
Subsequent Event
Common Stock Activity [Line Items]
Common stock dividends declared (in USD per share)	$ 0.91
Series E Preferred Stock
Common Stock Activity [Line Items]
Series E Preferred stock, shares authorized (in shares)		3,000,000