United Parcel Service, Inc. Quarterly report [Sections 13 or 15(d)]

Quarterly report [Sections 13 or 15(d)]

DEBT AND FINANCING ARRANGEMENTS - Narrative (Details)

DEBT AND FINANCING ARRANGEMENTS - Narrative (Details)		1 Months Ended	9 Months Ended
DEBT AND FINANCING ARRANGEMENTS - Narrative (Details)	Aug. 12, 2026 USD ($)	Aug. 31, 2026 USD ($)	Sep. 30, 2026 USD ($) aircraftLease	Sep. 30, 2025 USD ($)	Sep. 30, 2026 EUR (€) credit_agreement	Sep. 30, 2026 USD ($) credit_agreement	Aug. 18, 2026 USD ($)	Dec. 31, 2025 EUR (€)	Dec. 31, 2025 USD ($)
Debt Instrument [Line Items]
Face value of debt instrument						$ 26,321,000,000
Finance lease obligations						$ 1,467,000,000			$ 781,000,000
Pension contribution funded through debt issuance		$ 450,000,000	$ 450,000,000	$ 0
Number of credit agreements \| credit_agreement					2	2
Number of aircraft leases \| aircraftLease			9
Build-To-Suit Facility
Debt Instrument [Line Items]
Finance lease obligations						$ 230,000,000			132,000,000
Significant Other Observable Inputs (Level 2)
Debt Instrument [Line Items]
Long-term debt fair value						22,400,000,000			22,800,000,000
Property Lease Guarantee
Debt Instrument [Line Items]
Guarantee amount (up to)						1,800,000,000
U.S. Commercial Paper Program \| Commercial Paper
Debt Instrument [Line Items]
Commercial paper program, authorized to borrow						10,000,000,000.0
Commercial paper						$ 0			0
Foreign Commercial Paper Program \| Commercial Paper
Debt Instrument [Line Items]
Commercial paper program, authorized to borrow \| €					€ 5,000,000,000.0
Commercial paper \| €					€ 0			€ 0
4.650% senior notes \| Senior notes
Debt Instrument [Line Items]
Debt instrument, stated interest rate					4.65%	4.65%
Long-term debt						$ 498,000,000			498,000,000
Face value of debt instrument						$ 500,000,000
5.250% senior notes \| Senior notes
Debt Instrument [Line Items]
Debt instrument, stated interest rate					5.25%	5.25%
Long-term debt						$ 1,240,000,000			1,240,000,000
Face value of debt instrument						$ 1,250,000,000
5.950% senior notes \| Senior notes
Debt Instrument [Line Items]
Debt instrument, stated interest rate					5.95%	5.95%
Long-term debt						$ 1,232,000,000			1,232,000,000
Face value of debt instrument						$ 1,250,000,000
6.050% senior notes \| Senior notes
Debt Instrument [Line Items]
Debt instrument, stated interest rate					6.05%	6.05%
Long-term debt						$ 985,000,000			985,000,000
Face value of debt instrument						1,000,000,000
Revolving Credit Facility Expiring In 2026
Debt Instrument [Line Items]
Revolving credit facilities						1,000,000,000.0
Amounts outstanding						0			0
Revolving Credit Facility Expiring In 2026 \| Aplicable Margin
Debt Instrument [Line Items]
Basis spread on variable rate			0.70%
Revolving Credit Facility Expiring In 2029
Debt Instrument [Line Items]
Revolving credit facilities						2,000,000,000.0
Amounts outstanding						$ 0			0
Revolving Credit Facility Expiring In 2029 \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate			0.10%
Revolving Credit Facility Expiring In 2029 \| Aplicable Margin
Debt Instrument [Line Items]
Basis spread on variable rate			0.70%
4.850% senior notes \| Senior notes
Debt Instrument [Line Items]
Debt instrument, stated interest rate	4.85%				4.85%	4.85%
Long-term debt						$ 996,000,000			$ 0
Face value of debt instrument	$ 1,000,000,000.0					$ 1,000,000,000
Redemption price percent	100.00%
Pension contribution funded through debt issuance	$ 450,000,000
Floating Rate Senior Notes Due 2076 \| Senior notes
Debt Instrument [Line Items]
Debt instrument, stated interest rate							0.35%
Face value of debt instrument							$ 325,000,000
Callable term							30 years
Redeemable term							1 year