Leases (Schedule of Lease Maturity) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Future payments - operating leases
2022	$ 55
2023	51
2024	42
2025	36
2026	25
Thereafter	85
Total future payments	294
Future payments - finance leases
2022	9
2023	6
2024	4
2025	2
2026	0
Thereafter	0
Total future payments	21
2022	64
2023	57
2024	46
2025	38
2026	25
Thereafter	85
Total future payments	315
Operating Leases
Total future payments	294
Less imputed interest	(65)
Present value of future lease payments	229
Less current portion of lease obligations	(41)	$ (44)
Noncurrent portion of lease obligations	188	$ 186
Finance Leases
Total future payments	21
Less imputed interest	(1)
Present value of future lease payments	20
Less current portion of lease obligations	(9)
Noncurrent portion of lease obligations	11
Less imputed interest	(66)
Present value of future lease payments	249
Less current portion of lease obligations	(50)
Noncurrent portion of lease obligations	$ 199

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Operating And Finance Lease, Liability, Current

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Operating And Finance Lease, Liability, Undiscounted Excess Amount

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Operating Lease And Finance Lease, Liability, Payment, Due

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Operating Lease And Finance Lease, Liability, To Be Paid, After Year Five

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Operating Lease And Finance Lease, Liability, Payments, Due Next Twelve Months

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Operating Lease And Finance Lease, Liability, To Be Paid, Year Four

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Operating Lease And Finance Lease, Liability, To Be Paid, Year Three

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
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Present value of lessee's discounted obligation for lease payments from finance lease, classified as current.

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-Paragraph 1
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Present value of lessee's discounted obligation for lease payments from finance lease, classified as noncurrent.

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Amount of lessee's undiscounted obligation for lease payments for finance lease.

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Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for operating lease.

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Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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