Offsetting Assets and Liabilities - Assets (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Derivatives:
Gross Amounts of Recognized Assets		$ 5,574	$ 5,870
Amounts of Assets Presented in the Consolidated Balance Sheets		5,574	5,870
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial instruments	[1]	(3,745)	(3,978)
Cash collateral		(1,637)	(1,452)
Securities collateral		(114)	(315)
Net amount		78	125
Securities borrowed
Gross Amounts of Recognized Assets		135	147
Amounts of Assets Presented in the Consolidated Balance Sheets		135	147
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial instruments	[1]	(41)	(43)
Securities collateral		(91)	(103)
Net amount		3	1
Total
Gross Amounts of Recognized Assets		5,709	6,017
Amounts of Assets Presented in the Consolidated Balance Sheets		5,709	6,017
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial instruments	[1]	(3,786)	(4,021)
Cash collateral		(1,637)	(1,452)
Securities collateral		(205)	(418)
Net amount		81	126
OTC
Derivatives:
Gross Amounts of Recognized Assets		5,387	5,501
Amounts of Assets Presented in the Consolidated Balance Sheets		5,387	5,501
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial instruments	[1]	(3,613)	(3,862)
Cash collateral		(1,637)	(1,287)
Securities collateral		(114)	(315)
Net amount		23	37
OTC cleared
Derivatives:
Gross Amounts of Recognized Assets		88	58
Amounts of Assets Presented in the Consolidated Balance Sheets		88	58
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial instruments	[1]	(41)	(25)
Net amount		47	33
Exchange-traded
Derivatives:
Gross Amounts of Recognized Assets		99	311
Amounts of Assets Presented in the Consolidated Balance Sheets		99	311
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial instruments	[1]	(91)	(91)
Cash collateral			(165)
Net amount		$ 8	$ 55

[1] Represents the amount of assets that could be offset by liabilities with the same counterparty under master netting or similar arrangements that management elects not to offset on the Consolidated Balance Sheets.