(Debt Extinguishment) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Extinguishment of Debt [Line Items]
Early debt reductions (a)	[1]	$ 0	$ 503	$ 2,472
Pre-tax early debt extinguishment costs (b)	[2]	$ 0	$ 93	$ 461

[1] Reductions related to notes with interest rates ranging from 3.00% to 8.70% with original maturities from 2021 to 2048 for the years ended December 31, 2022 and 2021.

[2] Amounts are included in Restructuring and other charges in the accompanying consolidated statements of operations.