Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions				3 Months Ended	12 Months Ended
	Oct. 15, 2027	Oct. 31, 2024	Oct. 30, 2024	Jan. 15, 2025	Dec. 31, 2024	Dec. 31, 2023
Class of Stock [Line Items]
Common stock, shares authorized (in shares)					1,200,000,000	1,200,000,000
Preferred stock, shares authorized (in shares)					20,000,000	20,000,000
Sale of stock, number of shares issued in transaction (in shares)			129,375,000
Common stock, par value (in dollars per share)			$ 5.00		$ 5.00	$ 5.00
Sale of stock, consideration received on transaction		$ 5,651	$ 18,181
Additional paid in capital, period increase (decrease)						$ (267)
Subsequent Event
Class of Stock [Line Items]
Dividends, preferred stock				$ 72
Preferred stock, dividends per share, declared (in dollars per share)				$ 12.50
Forecast
Class of Stock [Line Items]
Equity instrument, convertible, threshold consecutive trading days	20 days
Equity instrument, convertible, threshold consecutive trading days trigger period	21 days
Depositary Share
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)		115,000,000
Mandatory convertible preferred stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)					20,000,000
Preferred stock, shares, issued (in shares)		5,750,000			5,750,000
Preferred stock, dividend rate, percentage		6.00%			6.00%
Preferred stock, liquidation preference per share (in dollars per share)		$ 1,000
Preferred stock, par value (in dollars per share)		$ 1.00			$ 1.00
Mandatory convertible preferred stock | Forecast
Class of Stock [Line Items]
Conversion of stock, shares converted (in shares)	5.8280
Mandatory convertible preferred stock | Minimum | Forecast
Class of Stock [Line Items]
Conversion of stock, shares converted (in shares)	5.8280
Mandatory convertible preferred stock | Maximum | Forecast
Class of Stock [Line Items]
Conversion of stock, shares converted (in shares)	6.9940