Debt (Tables)

12 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Summary of Short-Term Debt

The carrying value of Short-term debt, net of unamortized debt issuance costs, at September 30 consisted of:

(Millions of dollars)	2020		2019
Current portion of long-term debt
0.174% Notes due June 4, 2021	701		—
2.404% Notes due June 5, 2020	—		999
2.675% Notes due December 15, 2019	—		300
Other	5		10
Total short-term debt	$	707	$	1,309

Summary of Long-Term Debt

The carrying value of Long-Term Debt, net of unamortized debt issuance costs, at September 30 consisted of:

(Millions of dollars)		2020		2019
3.250% Notes due November 12, 2020	(a)	—		699
Floating Rate Notes due December 29, 2020	(a)	—		748
0.174% Notes due June 4, 2021		—		651
3.125% Notes due November 8, 2021		1,008		1,004
2.894% Notes due June 6, 2022		1,797		1,795
Floating Rate Notes due June 6, 2022		499		498
1.000% Notes due December 15, 2022		584		542
Revolving Credit Facility due December 29, 2022		—		480
3.300% Notes due March 1, 2023		295		295
1.401% Notes due May 24, 2023		350		325
0.632% Notes due June 4, 2023		933		867
3.875% Notes due May 15, 2024		180		181
3.363% Notes due June 6, 2024		1,742		1,740
3.734% Notes due December 15, 2024		1,370		1,369
3.020% Notes due May 24, 2025		320		306
1.208% Notes due June 4, 2026		699		649
6.700% Notes due December 1, 2026		172		174
1.900% Notes due December 15, 2026		582		541
3.700% Notes due June 6, 2027		1,715		1,714
7.000% Debentures due August 1, 2027		175		175
6.700% Debentures due August 1, 2028		174		175
2.823% Notes due May 20, 2030	(b)	743		—
6.000% Notes due May 15, 2039		246		246
5.000% Notes due November 12, 2040		124		124
4.875% Notes due May 15, 2044		247		248
4.685% Notes due December 15, 2044		1,044		1,045
4.669% Notes due June 6, 2047		1,485		1,485
3.794% Notes due May 20, 2050	(b)	742		—
Other long-term debt		—		5
Total Long-Term Debt		$	17,224	$	18,081

(a)All of the aggregate principal amount outstanding was redeemed during 2020, as further discussed below.

(b)Represents notes issued during 2020, as further discussed below.

Schedule of Extinguishment of Debt

Under this cash tender offer, the Company repurchased the following aggregate principal amounts of its long-term debt at an aggregate market price of $1.169 billion:

Interest Rate and Maturity	Aggregate Principal Amount (Millions of dollars)
3.700% Notes due June 6, 2027	$	675
5.000% Notes due November 12, 2040	175
4.875% Notes due May 15, 2044	75
4.685% Notes due December 15, 2044	175
Total notes purchased	$	1,100

Summary of Interest Costs and Payments

A summary of interest costs and payments for the years ended September 30 is as follows:

(Millions of dollars)	2020		2019		2018
Charged to operations	$	528	$	639	$	706
Capitalized	43		44		42
Total interest costs	$	571	$	683	$	748
Interest paid, net of amounts capitalized	$	515	$	658	$	674