Debt (Tables)

9 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Schedule of Debt

The Company had outstanding debt as follows:

	June 30, 2019			September 30, 2018			Effective Interest Rate
	(in millions, except percentages)
2.20% Senior Notes due December 2020	$	3,000		$	3,000		2.30	%
2.15% Senior Notes due September 2022	1,000			1,000			2.30	%
2.80% Senior Notes due December 2022	2,250			2,250			2.89	%
3.15% Senior Notes due December 2025	4,000			4,000			3.26	%
2.75% Senior Notes due September 2027	750			750			2.91	%
4.15% Senior Notes due December 2035	1,500			1,500			4.23	%
4.30% Senior Notes due December 2045	3,500			3,500			4.37	%
3.65% Senior Notes due September 2047	750			750			3.73	%
Total senior notes	16,750			16,750
Unamortized discounts and debt issuance costs	(111		)	(120		)
Hedge accounting fair value adjustments	55			—
Total long-term debt	$	16,694		$	16,630