Basis of Presentation Basis of Presentation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	$ 86		$ 86			$ 100
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense	4	$ 14	8	$ 25
Percentage of LIFO Inventory								10.00%
Cost of Revenue	(21,463)	(15,173)	(38,808)	(29,192)
Net Income (Loss) Attributable to Parent	$ 712	$ 469	$ 1,401	$ 860
Earnings Per Share, Diluted	$ 1.26	$ 0.84	$ 2.48	$ 1.53
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (21,603)	$ (19,311)	$ (21,603)	$ (19,311)	$ (20,861)	(20,022)	$ (18,976)	$ (19,225)
Unrealized Gain (Loss) on Marketable Securities, Cost Method Investments, and Other Investments	40	11	40	19
Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (20,762)	$ (19,293)	$ (20,762)	(19,293)	$ (20,261)	$ (19,780)	$ (19,026)	(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