Basis of Presentation Basis of Presentation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	$ 82		$ 82			$ 100
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense	1	$ 7	9	$ 32
Percentage of LIFO Inventory								10.00%
Cost of Revenue	(19,014)	(14,084)	(57,822)	(43,276)
Net Income (Loss) Attributable to Parent	$ 526	$ 225	$ 1,927	$ 1,085
Earnings Per Share, Diluted	$ 0.93	$ 0.40	$ 3.41	$ 1.93
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (21,990)	$ (19,341)	$ (21,990)	$ (19,341)	$ (21,603)	(20,022)	$ (19,311)	$ (19,225)
Gain (Loss) on Investments	9	4	49	23
Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (21,081)	$ (19,311)	$ (21,081)	(19,311)	$ (20,762)	$ (19,780)	$ (19,293)	(18,958)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest								$ 8
Change in Accounting Principle, Other [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of Revenue				91
Net Income (Loss) Attributable to Parent				$ 69
Earnings Per Share, Diluted				$ 0.12