Derivative Instruments and Hedging Activities (Long-term debt hedged items) (Details) - Fair Value Hedging - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Par value of hedged liabilities	$ (500,000,000)	$ (500,000,000)
Carrying amount of hedged liabilities	(435,000,000)	(507,000,000)
Cumulative amount of fair value hedging adjustment included in the carrying amount of the hedged liabilities	65,000,000	(7,000,000)
Par value of hedged assets	1,228,000,000	479,000,000
Carrying amount of hedged assets	962,000,000	435,000,000
Cumulative amount of fair value hedging adjustment included in the carrying amount of the hedged assets	$ (266,000,000)	$ (44,000,000)