Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Trade receivables, allowances	$ 70	$ 23
Other receivables, allowances	36	38
Other assets, noncurrent, allowances for long-term receivables	$ 21	$ 22
Common stock, shares issued (in shares)	2,109,316,331	2,109,316,331
Repurchased stock, shares (in shares)	559,146,338	551,942,600