Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2022

Fair Value Disclosures [Abstract]

Summary Of Carrying And Fair Values Of Long-Term Debt

The carrying and fair values of the Company's total long-term debt are summarized in the table below.

	June 30, 2022				December 31, 2021
	Carrying Value		Fair Value		Carrying Value		Fair Value
3.60% 2022 Senior Notes	$	—	$	—	$	250	$	252
0.875% 2024 Senior Notes	298		286		298		287
3.60% 2026 Senior Notes	745		733		745		805
Loan related to tax-exempt waste disposal revenue bonds due 2027	11		11		11		11
1.625% 2029 Senior Notes	725		620		786		824
3.375% 2030 Senior Notes	297		271		296		319
3.50% 2032 GO Zone Refunding Senior Notes	249		238		249		271
2.875% 2041 Senior Notes	339		248		339		339
5.0% 2046 Senior Notes	679		659		678		885
4.375% 2047 Senior Notes	492		432		492		592
3.125% 2051 Senior Notes	577		420		577		582
3.375% 2061 Senior Notes	431		305		431		432
8.73% 2022 RS Cogen Debt	10		10		19		19
2026 Term Loans	15		15		9		9