Components of Long-term Debt (Detail) - USD ($) $ in Millions		3 Months Ended
		Sep. 30, 2023	Jun. 30, 2023
Debt Instrument [Line Items]
Total face value		$ 51,292	$ 52,866
Unamortized discount and issuance costs		(431)	(438)
Hedge fair value adjustments	[1]	(109)	(106)
Premium on debt exchange		(5,058)	(5,085)
Total debt		45,694	47,237
Current portion of long-term debt		(3,748)	(5,247)
Long-term debt		$ 41,946	41,990
2009 Issuance of $3.8 billion
Debt Instrument [Line Items]
Maturities (calendar year)		2039
Stated Interest Rate		5.20%
Effective Interest Rate		5.24%
Total face value		$ 520	520
2010 Issuance of $4.8 billion
Debt Instrument [Line Items]
Maturities (calendar year)		2040
Stated Interest Rate		4.50%
Effective Interest Rate		4.57%
Total face value		$ 486	486
2011 Issuance of $2.3 billion
Debt Instrument [Line Items]
Maturities (calendar year)		2041
Stated Interest Rate		5.30%
Effective Interest Rate		5.36%
Total face value		$ 718	718
2012 Issuance of $2.3 billion
Debt Instrument [Line Items]
Maturities (calendar year)		2042
Stated Interest Rate		3.50%
Effective Interest Rate		3.57%
Total face value		$ 454	454
2013 Issuance of $5.2 billion
Debt Instrument [Line Items]
Total face value		$ 1,814	1,814
2013 Issuance of $5.2 billion | Minimum
Debt Instrument [Line Items]
Maturities (calendar year)		2023
Stated Interest Rate		3.63%
Effective Interest Rate		3.73%
2013 Issuance of $5.2 billion | Maximum
Debt Instrument [Line Items]
Maturities (calendar year)		2043
Stated Interest Rate		4.88%
Effective Interest Rate		4.92%
2013 Issuance of € 4.1 billion
Debt Instrument [Line Items]
Total face value		$ 2,435	2,509
2013 Issuance of € 4.1 billion | Minimum
Debt Instrument [Line Items]
Maturities (calendar year)		2028
Stated Interest Rate		2.63%
Effective Interest Rate		2.69%
2013 Issuance of € 4.1 billion | Maximum
Debt Instrument [Line Items]
Maturities (calendar year)		2033
Stated Interest Rate		3.13%
Effective Interest Rate		3.22%
2015 Issuance of $23.8 billion
Debt Instrument [Line Items]
Total face value		$ 9,805	9,805
2015 Issuance of $23.8 billion | Minimum
Debt Instrument [Line Items]
Maturities (calendar year)		2025
Stated Interest Rate		2.70%
Effective Interest Rate		2.77%
2015 Issuance of $23.8 billion | Maximum
Debt Instrument [Line Items]
Maturities (calendar year)		2055
Stated Interest Rate		4.75%
Effective Interest Rate		4.78%
2016 Issuance of $19.8 billion
Debt Instrument [Line Items]
Total face value		$ 7,930	9,430
2016 Issuance of $19.8 billion | Minimum
Debt Instrument [Line Items]
Maturities (calendar year)		2026
Stated Interest Rate		2.40%
Effective Interest Rate		2.46%
2016 Issuance of $19.8 billion | Maximum
Debt Instrument [Line Items]
Maturities (calendar year)		2056
Stated Interest Rate		3.95%
Effective Interest Rate		4.03%
2017 Issuance of $17.0 billion
Debt Instrument [Line Items]
Total face value		$ 8,945	8,945
2017 Issuance of $17.0 billion | Minimum
Debt Instrument [Line Items]
Maturities (calendar year)		2024
Stated Interest Rate		2.88%
Effective Interest Rate		3.04%
2017 Issuance of $17.0 billion | Maximum
Debt Instrument [Line Items]
Maturities (calendar year)		2057
Stated Interest Rate		4.50%
Effective Interest Rate		4.53%
2020 Issuance of $10.0 billion
Debt Instrument [Line Items]
Total face value		$ 10,000	10,000
2020 Issuance of $10.0 billion | Minimum
Debt Instrument [Line Items]
Maturities (calendar year)		2050
Stated Interest Rate		2.53%
Effective Interest Rate		2.53%
2020 Issuance of $10.0 billion | Maximum
Debt Instrument [Line Items]
Maturities (calendar year)		2060
Stated Interest Rate		2.68%
Effective Interest Rate		2.68%
2021 issuance of $8.2 billion
Debt Instrument [Line Items]
Total face value		$ 8,185	$ 8,185
2021 issuance of $8.2 billion | Minimum
Debt Instrument [Line Items]
Maturities (calendar year)		2052
Stated Interest Rate		2.92%
Effective Interest Rate		2.92%
2021 issuance of $8.2 billion | Maximum
Debt Instrument [Line Items]
Maturities (calendar year)		2062
Stated Interest Rate		3.04%
Effective Interest Rate		3.04%

[1] Refer to Note 5 – Derivatives for further information on the interest rate swaps related to fixed-rate debt.