Contingencies And Commitments (Future Minimum Lease Payments) (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Operating Leases
2022	$ 46,000,000
2023	43,000,000
2024	30,000,000
2025	23,000,000
2026	21,000,000
Thereafter	27,000,000
Total future minimum lease payments	190,000,000
Less: Amount representing interest	33,000,000
Present value of minimum lease payments	157,000,000	$ 194,000,000
Finance Leases
2022	72,000,000
2023	79,000,000
2024	17,000,000
2025	7,000,000
2026	4,000,000
Total future minimum lease payments	179,000,000
Less: Amount representing interest	4,000,000
Present value of minimum lease payments	175,000,000	$ 234,000,000
Sale-Leaseback Arrangements [Member]
Finance Leases
2022	8,000,000
2023	26,000,000
2024	80,000,000
2025	114,000,000
2026	165,000,000
Thereafter	4,000,000
Total future minimum lease payments	397,000,000
Less: Amount representing interest	22,000,000
Present value of minimum lease payments	$ 375,000,000