Equity - Schedule of Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Sep. 08, 2008	Jun. 04, 2008	May 22, 2008	May 19, 2008	Dec. 14, 2007	Nov. 21, 2007
Class of Stock [Line Items]
Senior preferred stock value	$ 120,836	$ 120,836
Preferred stock, shares issued	555,374,922	555,374,922
Preferred stock	$ 19,130	$ 19,130
Preferred stock, shares outstanding	555,374,922	555,374,922
Series 2008-2
Class of Stock [Line Items]
Senior preferred stock issued, shares	1,000,000	1,000,000
Senior preferred stock value	$ 120,836	$ 120,836
Senior preferred stock, stated value per share (in dollars per share)	$ 120,836		$ 1,000
Aggregate liquidation preference of senior preferred stock			$ 1,000
Series D
Class of Stock [Line Items]
Preferred stock, shares issued	3,000,000	3,000,000
Preferred stock	$ 150	$ 150
Preferred stock, stated value per share (in dollars per share)	$ 50
Preferred stock, annual dividend rate	5.25%
Series E
Class of Stock [Line Items]
Preferred stock, shares issued	3,000,000	3,000,000
Preferred stock	$ 150	$ 150
Preferred stock, stated value per share (in dollars per share)	$ 50
Preferred stock, annual dividend rate	5.10%
Series F
Class of Stock [Line Items]
Preferred stock, shares issued	14,000,000	14,000,000
Preferred stock	$ 690	$ 690
Preferred stock, stated value per share (in dollars per share)	$ 50
Preferred stock, annual dividend rate	2.016%
Preferred stock, redemption terms	two
Series G
Class of Stock [Line Items]
Preferred stock, shares issued	6,000,000	6,000,000
Preferred stock	$ 288	$ 288
Preferred stock, stated value per share (in dollars per share)	$ 50
Preferred stock, annual dividend rate	4.024%
Series H
Class of Stock [Line Items]
Preferred stock, shares issued	8,000,000	8,000,000
Preferred stock	$ 400	$ 400
Preferred stock, stated value per share (in dollars per share)	$ 50
Preferred stock, annual dividend rate	5.81%
Series I
Class of Stock [Line Items]
Preferred stock, shares issued	6,000,000	6,000,000
Preferred stock	$ 300	$ 300
Preferred stock, stated value per share (in dollars per share)	$ 50
Preferred stock, annual dividend rate	5.375%
Series L
Class of Stock [Line Items]
Preferred stock, shares issued	7,000,000	7,000,000
Preferred stock	$ 345	$ 345
Preferred stock, stated value per share (in dollars per share)	$ 50
Preferred stock, annual dividend rate	5.125%
Series M
Class of Stock [Line Items]
Preferred stock, shares issued	9,000,000	9,000,000
Preferred stock	$ 460	$ 460
Preferred stock, stated value per share (in dollars per share)	$ 50
Preferred stock, annual dividend rate	4.75%
Series N
Class of Stock [Line Items]
Preferred stock, shares issued	5,000,000	5,000,000
Preferred stock	$ 225	$ 225
Preferred stock, stated value per share (in dollars per share)	$ 50
Preferred stock, annual dividend rate	5.50%
Series O
Class of Stock [Line Items]
Preferred stock, shares issued	50,000,000	50,000,000
Preferred stock	$ 2,500	$ 2,500
Preferred stock, stated value per share (in dollars per share)	$ 50
Preferred stock, annual dividend rate	7.00%
Convertible Series 2004-1
Class of Stock [Line Items]
Preferred stock, shares issued	24,922	24,922
Preferred stock	$ 2,492	$ 2,492
Preferred stock, stated value per share (in dollars per share)	$ 100,000
Preferred stock, annual dividend rate	5.375%
Preferred stock, shares outstanding	24,922	24,922
Series P
Class of Stock [Line Items]
Preferred stock, shares issued	40,000,000	40,000,000
Preferred stock	$ 1,000	$ 1,000
Preferred stock, stated value per share (in dollars per share)	$ 25
Preferred stock, annual dividend rate	5.504%
Series Q
Class of Stock [Line Items]
Preferred stock, shares issued	15,000,000	15,000,000
Preferred stock	$ 375	$ 375
Preferred stock, stated value per share (in dollars per share)	$ 25
Preferred stock, annual dividend rate	6.75%
Series R
Class of Stock [Line Items]
Preferred stock, shares issued	21,000,000	21,000,000					1,200,000	20,000,000
Preferred stock	$ 530	$ 530					$ 30	$ 500
Preferred stock, stated value per share (in dollars per share)	$ 25
Preferred stock, annual dividend rate	7.625%
Series S
Class of Stock [Line Items]
Preferred stock, shares issued	280,000,000	280,000,000
Preferred stock	$ 7,000	$ 7,000
Preferred stock, stated value per share (in dollars per share)	$ 25
Preferred stock, annual dividend rate	8.984%
Preferred stock, redemption terms	five
Series T
Class of Stock [Line Items]
Preferred stock, shares issued	89,000,000	89,000,000		1,000,000	8,000,000	80,000,000
Preferred stock	$ 2,225	$ 2,225			$ 200	$ 2,000
Preferred stock, stated value per share (in dollars per share)	$ 25
Preferred stock, annual dividend rate	8.25%
Liquidation preference				$ 25
Maximum | Series F
Class of Stock [Line Items]
Preferred stock, annual dividend rate	11.00%
Maximum | Series G
Class of Stock [Line Items]
Preferred stock, annual dividend rate	11.00%
Minimum | Series O
Class of Stock [Line Items]
Preferred stock, annual dividend rate	7.00%
Minimum | Series P
Class of Stock [Line Items]
Preferred stock, annual dividend rate	4.50%
Minimum | Series S
Class of Stock [Line Items]
Preferred stock, annual dividend rate	7.75%
Two-year Constant Maturity U.S. Treasury Rate | Series F
Class of Stock [Line Items]
Preferred stock dividend rate, basis spread on variable rate	0.16%
Two-year Constant Maturity U.S. Treasury Rate | Series G
Class of Stock [Line Items]
Preferred stock dividend rate, basis spread on variable rate	0.18%
Ten-year Constant Maturity U.S. Treasury Rate | Series O
Class of Stock [Line Items]
Preferred stock dividend rate, basis spread on variable rate	2.375%
Three-Month LIBOR | Series P
Class of Stock [Line Items]
Preferred stock dividend rate, basis spread on variable rate	0.75%
Three-Month LIBOR | Series S
Class of Stock [Line Items]
Preferred stock dividend rate, basis spread on variable rate	4.23%
US Treasury
Class of Stock [Line Items]
Aggregate liquidation preference of senior preferred stock	$ 180,300
Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares issued	556,000,000	556,000,000