Income Taxes, Income Taxes Paid (Refunded), Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021		Dec. 31, 2020	Dec. 31, 2019
Income Taxes Paid, Net
Income taxes paid (refunded), net	$ (842)		$ 203	$ (116)
U.S. [Member]
Income Taxes Paid, Net
Income taxes paid (refunded), net	(878)	[1]	130	(298)	[2]
U.S. [Member] | Internal Revenue Service (IRS) [Member]
Income Taxes Paid (Textual)
Refund received, including interest, associated with income tax audit	962			348
Foreign [Member]
Income Taxes Paid, Net
Income taxes paid (refunded), net	$ 36		$ 73	$ 182

[1] This amount includes a refund of $962 million that we received related to our U.S. federal income tax return for 2020.

[2] This amount includes a refund of $348 million, including interest, that we received related to the settlement of the combined audit of our U.S. federal income tax returns for 2010 and 2011. See “Tax Returns Under Audit–U.S. Federal” on page 121.