Contingencies and Commitments (Future Minimum Lease Payments) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Operating Leases
2022	$ 37
2023	33
2024	27
2025	23
2026	21
Thereafter	27
Total future minimum lease payments	168
Less: Amount representing interest	28
Present value of minimum lease payments	140	$ 170
Finance Leases
2022	72
2023	79
2024	17
2025	7
2026	4
Total future minimum lease payments	179
Less: Amount representing interest	4
Present value of minimum lease payments	175	234
Sale-Leaseback Arrangements [Member]
Finance Leases
2022	8
2023	26
2024	80
2025	114
2026	165
Thereafter	4
Total future minimum lease payments	397
Less: Amount representing interest	22
Present value of minimum lease payments	$ 375	$ 216