Fair Value Measurements (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Assets:
Investments	$ 10	$ 11
Foreign Exchange Contracts	10	1
Total Assets at Fair Value	20	12
Liabilities:
Foreign Exchange Contracts	5	34
Total Liabilities at Fair Value	5	34
Supplemental Fair Value Information
Carrying amount — liability	6,736	5,334
Notes Payable and Overdrafts	406	406
Fixed Rate Debt, Excluding Capital Leases
Supplemental Fair Value Information
Carrying amount — liability	5,781	4,094
Fair value — liability	6,149	4,283
Notes Payable and Overdrafts	227	227
Variable Rate Debt, Excluding Capital Leases
Supplemental Fair Value Information
Carrying amount — liability	955	1,240
Fair value — liability	955	1,197
Notes Payable and Overdrafts	179	179
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)
Assets:
Investments	10	11
Foreign Exchange Contracts	0	0
Total Assets at Fair Value	10	11
Liabilities:
Foreign Exchange Contracts	0	0
Total Liabilities at Fair Value	0	0
Supplemental Fair Value Information
Fair value — liability	5,905	4,391
Significant Other Observable Inputs (Level 2)
Assets:
Investments	0	0
Foreign Exchange Contracts	10	1
Total Assets at Fair Value	10	1
Liabilities:
Foreign Exchange Contracts	5	34
Total Liabilities at Fair Value	5	34
Significant Unobservable Inputs (Level 3)
Assets:
Investments	0	0
Foreign Exchange Contracts	0	0
Total Assets at Fair Value	0	0
Liabilities:
Foreign Exchange Contracts	0	0
Total Liabilities at Fair Value	$ 0	$ 0