Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Other current assets
Derivative assets-current	$ 34	$ 75
Held-to-maturity debt security held in trust		470
Insurance related (receivables, prepaid expenses and other)	125	172
Other	166	174
Total other current assets	325	891
Other assets
Deferred income taxes	871	521
Prepaid pension and post retirement	630	230
Insurance related receivables and other	49	67
Cash surrender value of life insurance policies	258	254
Equity method investments	134	70
Equity and other investments	80	126
Other	418	406
Total other assets	2,440	1,674
Other current liabilities
Accrued rebates	639	594
Deferred revenue	498	430
Derivative liabilities	81	17
Employee benefits and withholdings	192	229
Contingent liability claims and other	556	566
Property, sales-related and other taxes	308	247
Pension and postretirement benefits	71	67
Other	933	906
Total other current liabilities	3,278	3,056
Other liabilities
Long term income taxes payable	1,511	1,507
Employee benefits	410	312
Contingent liability claims and other	815	787
Finance lease obligations	93	111
Deferred income taxes	333	301
Other	300	257
Total other liabilities	$ 3,462	$ 3,275