Financial Derivatives (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Derivative [Line Items]
Gain (loss) from components excluded from assessment of net investment hedge effectiveness net			$ 0
Gain (loss) on net investment hedge derivatives	$ (28,000,000)	$ 0	(46,000,000)	$ 0
Cash and securities held to collateralize net derivative assets	2,100,000,000		2,100,000,000
Cash and securities pledged to collateralize net derivative liabilities	$ 2,100,000,000		2,100,000,000
Cash flow hedges | Interest Rate Contracts
Derivative [Line Items]
Cash flow hedge loss to be reclassified within twelve months			1,500,000,000
Cash flow hedge loss to be reclassified within twelve months, net of tax			$ 1,200,000,000
Maximum length of time hedged in cash flow hedge			10 years