Fair Value Disclosures (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	$ 2,767	$ 1,721
Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	2,767	1,721
Equity Securities	431	482
Total Assets	3,536	2,415
Total Liabilities	242
Recurring basis | Interest rate contracts
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Derivative Assets (Liabilities), at Fair Value, Net	(208)	23
Recurring basis | Foreign exchange contracts
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Derivative Assets (Liabilities), at Fair Value, Net	338	168
Recurring basis | Commodity contracts
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Derivative Assets (Liabilities), at Fair Value, Net	(34)	21
U.S. treasury bonds
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	10	10
U.S. treasury bonds | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	10	10
Other U.S. and non-U.S. government bonds
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	49	61
Other U.S. and non-U.S. government bonds | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	49	61
Corporate bonds
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	2,048	1,046
Corporate bonds | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	2,048	1,046
Asset-backed securities
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	180	176
Asset-backed securities | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	180	176
U.S. governmental agency | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	348	325
Residential
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	3	4
Residential | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	3	4
Commercial
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	129	99
Commercial | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	129	99
Large capitalization value | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Equity Securities	183	217
Smaller company growth | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Equity Securities	40	98
REIT | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Equity Securities	208	167
Level 1 | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	10	10
Equity Securities	223	315
Total Assets	233	325
Level 1 | U.S. treasury bonds | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	10	10
Level 1 | Large capitalization value | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Equity Securities	183	217
Level 1 | Smaller company growth | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Equity Securities	40	98
Level 2 | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	2,707	1,711
Total Assets	3,045	1,923
Total Liabilities	242
Level 2 | Recurring basis | Interest rate contracts
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Derivative Assets (Liabilities), at Fair Value, Net	(208)	23
Level 2 | Recurring basis | Foreign exchange contracts
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Derivative Assets (Liabilities), at Fair Value, Net	338	168
Level 2 | Recurring basis | Commodity contracts
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Derivative Assets (Liabilities), at Fair Value, Net	(34)	21
Level 2 | Other U.S. and non-U.S. government bonds | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	49	61
Level 2 | Corporate bonds | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	1,998	1,046
Level 2 | Asset-backed securities | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	180	176
Level 2 | U.S. governmental agency | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	348	325
Level 2 | Residential | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	3	4
Level 2 | Commercial | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	129	99
Fair Value Measured on Net Asset Value (NAV) | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Equity Securities	208	167
Total Assets	208	167
Fair Value Measured on Net Asset Value (NAV) | REIT | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Equity Securities	208	167
Level 3 | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	50
Total Assets	50
Level 3 | Corporate Debt Securities | Recurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Debt securities, Available-for-sale, Fair value	50
Financial Products | Level 3 | Nonrecurring basis
Assets and liabilities measured on a recurring and non-recurring basis at fair value
Loans carried at fair value	$ 90	$ 100