Offsetting Assets and Liabilities - Assets (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivatives:
Gross Amounts of Recognized Assets	$ 4,670	$ 5,574
Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Amounts of Assets Presented in the Consolidated Balance Sheets	4,670	5,574
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial Instruments	(3,442)	(3,745)
Cash Collateral	(1,089)	(1,637)
Securities Collateral	0	(114)
Net Amount	139	78
Securities borrowed
Gross Amounts of Recognized Assets	178	135
Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Amounts of Assets Presented in the Consolidated Balance Sheets	178	135
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial Instruments	(64)	(41)
Cash Collateral	0	0
Securities Collateral	(111)	(91)
Net Amount	3	3
Total
Gross Amounts of Recognized Assets	4,848	5,709
Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Amounts of Assets Presented in the Consolidated Balance Sheets	4,848	5,709
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial Instruments	(3,506)	(3,786)
Cash Collateral	(1,089)	(1,637)
Securities Collateral	(111)	(205)
Net Amount	142	81
OTC
Derivatives:
Gross Amounts of Recognized Assets	4,416	5,387
Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Amounts of Assets Presented in the Consolidated Balance Sheets	4,416	5,387
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial Instruments	(3,271)	(3,613)
Cash Collateral	(1,089)	(1,637)
Securities Collateral	0	(114)
Net Amount	56	23
OTC cleared
Derivatives:
Gross Amounts of Recognized Assets	156	88
Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Amounts of Assets Presented in the Consolidated Balance Sheets	156	88
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial Instruments	(82)	(41)
Cash Collateral	0	0
Securities Collateral	0	0
Net Amount	74	47
Exchange-traded
Derivatives:
Gross Amounts of Recognized Assets	98	99
Gross Amounts Offset in the Consolidated Balance Sheets	0	0
Amounts of Assets Presented in the Consolidated Balance Sheets	98	99
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial Instruments	(89)	(91)
Cash Collateral	0	0
Securities Collateral	0	0
Net Amount	$ 9	$ 8