Consolidated Balance Sheets - USD ($) shares in Millions, $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets, Current [Abstract]
Cash and equivalents	$ 2,563	$ 2,268
Receivables (net of allowances for bad debts)	3,071	4,577
Inventories	2,349	3,139
Other current assets	942	1,048
Total current assets	9,475	11,212
Accounts Receivable, Allowance for Credit Loss, Current	824	776
Accounts Receivable, Allowance for Credit Loss, Current	824	776
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	11,039	12,630
Property, plant and equipment (net of accumulated depreciation)	4,325	7,310
Goodwill	2,804	2,812
Operating lease right-of-use assets	786	931
Other assets	1,124	1,429
Total assets	20,680	25,377
Current liabilities:
Accounts payable	1,573	2,432
Accrued employee compensation and benefits	517	604
Taxes other than income	292	310
Current portion of operating lease liabliities	251	208
Other current liabilities	1,093	1,313
Total current liabilities	4,421	4,878
Long-term debt	9,132	10,316
Operating lease liabilities	758	825
Employee compensation and benefits	562	525
Other liabilities	824	808
Total liabilities	15,697	17,352
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common stock, par value $2.50 per share	2,666	2,669
Paid-in capital in excess of par value	0	143
Accumulated other comprehensive loss	(362)	(362)
Retained earnings	8,691	11,989
Treasury stock, at cost	(6,021)	(6,427)
Company shareholders’ equity	4,974	8,012
Noncontrolling interest in consolidated subsidiaries	9	13
Total shareholders’ equity	4,983	8,025
Total liabilities and shareholders’ equity	$ 20,680	$ 25,377
Common Stock, Par or Stated Value Per Share	$ 2.50	$ 2.50
Common Stock, Shares Authorized	2,000	2,000
Common Stock, Shares, Issued	1,066	1,068
Treasury Stock, Shares	181	190
Assets Held-for-sale, Not Part of Disposal Group, Current	$ 550	$ 180
Long-term Debt, Current Maturities	695	11
Deferred Income Tax Assets, Net	$ 2,166	$ 1,683