CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income		$ 1,386	$ 890	$ 1,174
Other comprehensive income (loss):
Foreign currency translation adjustments	[1]	(26)	40	49
Fixed price diesel swaps		1	0	2
Other comprehensive income (loss)	[1]	(25)	40	51
Comprehensive income		$ 1,361	$ 930	$ 1,225

[1] There were no material reclassifications from accumulated other comprehensive loss reflected in other comprehensive income (loss) during the years ended December 31, 2021, 2020 or 2019. There was no material tax impact related to the foreign currency translation adjustments during the years ended December 31, 2021, 2020 or 2019. See note 15 to the consolidated financial statements for a discussion addressing our determination pertaining to the permanent reinvestment of unremitted foreign earnings. There were no material taxes associated with other comprehensive income (loss) during the years ended December 31, 2021, 2020 or 2019.