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Long-Term Debt (Tables)
 9 Months Ended
Sep. 30, 2021
Debt Disclosure [Abstract]  
Schedule Of Long-Term Debt
Long-term debt consists of the following:
September 30, 2021December 31, 2020
Principal
Amount		Unamortized
Discount
and Debt
Issuance
Costs		Net
Long-term
Debt		Principal
Amount		Unamortized
Discount
and Debt
Issuance
Costs		Net
Long-term
Debt
3.60% senior notes due 2022 (the "3.60% 2022 Senior Notes")
$250 $— $250 $250 $(1)$249 
0.875% senior notes due 2024 (the "0.875% 2024 Senior Notes")
300 (2)298 — — — 
3.60% senior notes due 2026 (the "3.60% 2026 Senior Notes")
750 (6)744 750 (6)744 
Loan related to tax-exempt waste disposal revenue bonds due 202711 11 11 — 11 
1.625% senior notes due 2029 (the "1.625% 2029 Senior Notes")
811 (9)802 859 (10)849 
3.375% senior notes due 2030 (the "3.375% 2030 Senior Notes")
300 (4)296 300 (4)296 
3.50% senior notes due 2032 (the "3.50% 2032 GO Zone Refunding Senior Notes")
250 (1)249 250 (1)249 
2.875% senior notes due 2041 (the "2.875% 2041 Senior Notes")
350 (11)339 — — — 
5.0% senior notes due 2046 (the "5.0% 2046 Senior Notes")
700 (22)678 700 (23)677 
4.375% senior notes due 2047 (the "4.375% 2047 Senior Notes")
500 (8)492 500 (9)491 
3.125% senior notes due 2051 (the "3.125% 2051 Senior Notes")
600 (23)577 — — — 
3.375% senior notes due 2061 (the "3.375% 2061 Senior Notes")
450 (19)431 — — — 
8.73% RS Cogen debt due 2022 (the "8.73% 2022 RS Cogen Debt")
24 24 — — — 
Term loans due 2026 (the "2026 Term Loans")6 — 6 — — — 
Total long-term debt5,302 (105)5,197 3,620 (54)3,566 
Less current portion:
3.60% 2022 Senior Notes
(250)— (250)— — — 
8.73% 2022 RS Cogen Debt
(18)— (18)— — — 
Long-term debt, net of current portion$5,034 $(105)$4,929 $3,620 $(54)$3,566