Other Assets and Liabilites - Schedule of Right of Use Assets and Future Maturities of Lease Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Lease Liabilities, Payments Due
2022	$ 302
2023	311
2024	265
2025	225
2026	184
Thereafter	428
Total lease payments, Operating Leases	1,715	2,079
Less: imputed interest, Operating Leases	$ 115	$ 183
Weighted Average Remaining Lease Term, Operating Leases	6 years 7 months 6 days	6 years 10 months 24 days
Weighted Average Discount Rate, Percent, Operating Leases	2.30%	2.40%
Operating Lease, Cost	$ 319	$ 360	$ 209
Finance Lease Liabilities, Payments, Due
2022	5
2023	5
2024	5
2025	4
2026	3
Thereafter	7
Total lease payments, Finance Leases	29	47
Less: imputed interest, Finance Leases	$ 3	$ 5
Weighted Average Remaining Lease Term, Finance Leases	6 years 4 months 24 days	6 years 3 months 18 days
Weighted Average Discount Rate, Percent, Finance Leases	3.50%	4.80%
Other Assets
Right of Use Assets
Right-of-Use Asset, Operating Leases	$ 1,168	$ 1,333
Right-of-Use Asset, Finance Leases	22	36
Other Liabilities
Operating Lease Liabilities, Payments Due
Total lease liabilities, Operating Leases	1,600	1,896
Finance Lease Liabilities, Payments, Due
Total lease liabilities, Finance Leases	$ 26	$ 42