Long-term Debt (Detail) - USD ($)
$ in Millions |
9 Months Ended |
12 Months Ended |
Mar. 31, 2016 |
Jun. 30, 2015 |
| Debt Instrument [Line Items] |
|
|
|
|
|
| Face Value |
|
$ 41,065
|
|
$ 30,463
|
|
| Notes 1.625 Percent Due September 25th 2015 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Sep. 25, 2015
|
|
Sep. 25, 2015
|
|
| Face Value |
|
|
[1] |
$ 1,750
|
|
| Stated Interest Rate |
|
1.625%
|
|
1.625%
|
|
| Effective Interest Rate |
|
1.795%
|
|
1.795%
|
|
| Notes 2.5 Percent Due February 8th 2016 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Feb. 08, 2016
|
|
Feb. 08, 2016
|
|
| Face Value |
|
|
[1] |
$ 750
|
|
| Stated Interest Rate |
|
2.50%
|
|
2.50%
|
|
| Effective Interest Rate |
|
2.642%
|
|
2.642%
|
|
| Notes 0.875 Percent Due November 15th 2017 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Nov. 15, 2017
|
|
Nov. 15, 2017
|
|
| Face Value |
|
$ 600
|
|
$ 600
|
|
| Stated Interest Rate |
|
0.875%
|
|
0.875%
|
|
| Effective Interest Rate |
|
1.084%
|
|
1.084%
|
|
| Notes 1.0 Percent Due May 1st 2018 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
May 01, 2018
|
|
May 01, 2018
|
|
| Face Value |
|
$ 450
|
|
$ 450
|
|
| Stated Interest Rate |
|
1.00%
|
|
1.00%
|
|
| Effective Interest Rate |
|
1.106%
|
|
1.106%
|
|
| Notes 1.30 Percent Due November 3rd 2018 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
[2] |
Nov. 03, 2018
|
|
Nov. 03, 2018
|
|
| Face Value |
[2] |
$ 1,750
|
|
|
[1] |
| Stated Interest Rate |
[2] |
1.30%
|
|
1.30%
|
|
| Effective Interest Rate |
[2] |
1.396%
|
|
1.396%
|
|
| Notes 1.625 Percent Due December 6th 2018 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Dec. 06, 2018
|
|
Dec. 06, 2018
|
|
| Face Value |
|
$ 1,250
|
|
$ 1,250
|
|
| Stated Interest Rate |
|
1.625%
|
|
1.625%
|
|
| Effective Interest Rate |
|
1.824%
|
|
1.824%
|
|
| Notes 4.2 Percent Due June 1st 2019 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Jun. 01, 2019
|
|
Jun. 01, 2019
|
|
| Face Value |
|
$ 1,000
|
|
$ 1,000
|
|
| Stated Interest Rate |
|
4.20%
|
|
4.20%
|
|
| Effective Interest Rate |
|
4.379%
|
|
4.379%
|
|
| Notes 1.850 Percent Due February 12th 2020 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Feb. 12, 2020
|
|
Feb. 12, 2020
|
|
| Face Value |
|
$ 1,500
|
|
$ 1,500
|
|
| Stated Interest Rate |
|
1.85%
|
|
1.85%
|
|
| Effective Interest Rate |
|
1.935%
|
|
1.935%
|
|
| Notes 3.0 Percent Due October 1st 2020 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Oct. 01, 2020
|
|
Oct. 01, 2020
|
|
| Face Value |
|
$ 1,000
|
|
$ 1,000
|
|
| Stated Interest Rate |
|
3.00%
|
|
3.00%
|
|
| Effective Interest Rate |
|
3.137%
|
|
3.137%
|
|
| Notes 2.0 Percent Due November 3rd 2020 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
[2] |
Nov. 03, 2020
|
|
Nov. 03, 2020
|
|
| Face Value |
[2] |
$ 2,250
|
|
|
[1] |
| Stated Interest Rate |
[2] |
2.00%
|
|
2.00%
|
|
| Effective Interest Rate |
[2] |
2.093%
|
|
2.093%
|
|
| Notes 4.0 Percent Due February 8th 2021 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Feb. 08, 2021
|
|
Feb. 08, 2021
|
|
| Face Value |
|
$ 500
|
|
$ 500
|
|
| Stated Interest Rate |
|
4.00%
|
|
4.00%
|
|
| Effective Interest Rate |
|
4.082%
|
|
4.082%
|
|
| Notes 2.125 Percent Due December 6th 2021 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
[3] |
Dec. 06, 2021
|
|
Dec. 06, 2021
|
|
| Face Value |
[3] |
$ 1,994
|
|
$ 1,950
|
|
| Stated Interest Rate |
[3] |
2.125%
|
|
2.125%
|
|
| Effective Interest Rate |
[3] |
2.233%
|
|
2.233%
|
|
| Notes 2.375 Percent Due February 12th 2022 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Feb. 12, 2022
|
|
Feb. 12, 2022
|
|
| Face Value |
|
$ 1,500
|
|
$ 1,500
|
|
| Stated Interest Rate |
|
2.375%
|
|
2.375%
|
|
| Effective Interest Rate |
|
2.466%
|
|
2.466%
|
|
| Notes 2.65 Percent Due November 3rd 2022 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
[2] |
Nov. 03, 2022
|
|
Nov. 03, 2022
|
|
| Face Value |
[2] |
$ 1,000
|
|
|
[1] |
| Stated Interest Rate |
[2] |
2.65%
|
|
2.65%
|
|
| Effective Interest Rate |
[2] |
2.717%
|
|
2.717%
|
|
| Notes 2.125 Percent Due November 15th 2022 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Nov. 15, 2022
|
|
Nov. 15, 2022
|
|
| Face Value |
|
$ 750
|
|
$ 750
|
|
| Stated Interest Rate |
|
2.125%
|
|
2.125%
|
|
| Effective Interest Rate |
|
2.239%
|
|
2.239%
|
|
| Notes 2.375 Percent Due May 1st 2023 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
May 01, 2023
|
|
May 01, 2023
|
|
| Face Value |
|
$ 1,000
|
|
$ 1,000
|
|
| Stated Interest Rate |
|
2.375%
|
|
2.375%
|
|
| Effective Interest Rate |
|
2.465%
|
|
2.465%
|
|
| Notes 3.625 Percent Due December 15th 2023 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Dec. 15, 2023
|
|
Dec. 15, 2023
|
|
| Face Value |
|
$ 1,500
|
|
$ 1,500
|
|
| Stated Interest Rate |
|
3.625%
|
|
3.625%
|
|
| Effective Interest Rate |
|
3.726%
|
|
3.726%
|
|
| Notes 2.70 Percent Due February 12th 2025 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Feb. 12, 2025
|
|
Feb. 12, 2025
|
|
| Face Value |
|
$ 2,250
|
|
$ 2,250
|
|
| Stated Interest Rate |
|
2.70%
|
|
2.70%
|
|
| Effective Interest Rate |
|
2.772%
|
|
2.772%
|
|
| Notes 3.125 Percent Due November 3rd 2025 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
[2] |
Nov. 03, 2025
|
|
Nov. 03, 2025
|
|
| Face Value |
[2] |
$ 3,000
|
|
|
[1] |
| Stated Interest Rate |
[2] |
3.125%
|
|
3.125%
|
|
| Effective Interest Rate |
[2] |
3.176%
|
|
3.176%
|
|
| Notes 3.125 Percent Due December 6th 2028 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
[3] |
Dec. 06, 2028
|
|
Dec. 06, 2028
|
|
| Face Value |
[3] |
$ 1,994
|
|
$ 1,950
|
|
| Stated Interest Rate |
[3] |
3.125%
|
|
3.125%
|
|
| Effective Interest Rate |
[3] |
3.218%
|
|
3.218%
|
|
| Notes 2.625 Percent Due May 2nd 2033 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
[3] |
May 02, 2033
|
|
May 02, 2033
|
|
| Face Value |
[3] |
$ 627
|
|
$ 613
|
|
| Stated Interest Rate |
[3] |
2.625%
|
|
2.625%
|
|
| Effective Interest Rate |
[3] |
2.69%
|
|
2.69%
|
|
| Notes 3.50 Percent Due February 12th 2035 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Feb. 12, 2035
|
|
Feb. 12, 2035
|
|
| Face Value |
|
$ 1,500
|
|
$ 1,500
|
|
| Stated Interest Rate |
|
3.50%
|
|
3.50%
|
|
| Effective Interest Rate |
|
3.604%
|
|
3.604%
|
|
| Notes 4.2 Percent Due November 3rd 2035 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
[2] |
Nov. 03, 2035
|
|
Nov. 03, 2035
|
|
| Face Value |
[2] |
$ 1,000
|
|
|
[1] |
| Stated Interest Rate |
[2] |
4.20%
|
|
4.20%
|
|
| Effective Interest Rate |
[2] |
4.26%
|
|
4.26%
|
|
| Notes 5.2 Percent Due June 1st 2039 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Jun. 01, 2039
|
|
Jun. 01, 2039
|
|
| Face Value |
|
$ 750
|
|
$ 750
|
|
| Stated Interest Rate |
|
5.20%
|
|
5.20%
|
|
| Effective Interest Rate |
|
5.24%
|
|
5.24%
|
|
| Notes 4.5 Percent Due October 1st 2040 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Oct. 01, 2040
|
|
Oct. 01, 2040
|
|
| Face Value |
|
$ 1,000
|
|
$ 1,000
|
|
| Stated Interest Rate |
|
4.50%
|
|
4.50%
|
|
| Effective Interest Rate |
|
4.567%
|
|
4.567%
|
|
| Notes 5.3 Percent Due February 8th 2041 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Feb. 08, 2041
|
|
Feb. 08, 2041
|
|
| Face Value |
|
$ 1,000
|
|
$ 1,000
|
|
| Stated Interest Rate |
|
5.30%
|
|
5.30%
|
|
| Effective Interest Rate |
|
5.361%
|
|
5.361%
|
|
| Notes 3.5 Percent Due November 15th 2042 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Nov. 15, 2042
|
|
Nov. 15, 2042
|
|
| Face Value |
|
$ 900
|
|
$ 900
|
|
| Stated Interest Rate |
|
3.50%
|
|
3.50%
|
|
| Effective Interest Rate |
|
3.571%
|
|
3.571%
|
|
| Notes 3.750 Percent Due May 1st 2043 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
May 01, 2043
|
|
May 01, 2043
|
|
| Face Value |
|
$ 500
|
|
$ 500
|
|
| Stated Interest Rate |
|
3.75%
|
|
3.75%
|
|
| Effective Interest Rate |
|
3.829%
|
|
3.829%
|
|
| Notes 4.875 Percent Due December 15th 2043 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Dec. 15, 2043
|
|
Dec. 15, 2043
|
|
| Face Value |
|
$ 500
|
|
$ 500
|
|
| Stated Interest Rate |
|
4.875%
|
|
4.875%
|
|
| Effective Interest Rate |
|
4.918%
|
|
4.918%
|
|
| Notes 3.750 Percent Due February 12th 2045 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Feb. 12, 2045
|
|
Feb. 12, 2045
|
|
| Face Value |
|
$ 1,750
|
|
$ 1,750
|
|
| Stated Interest Rate |
|
3.75%
|
|
3.75%
|
|
| Effective Interest Rate |
|
3.80%
|
|
3.80%
|
|
| Notes 4.45 Percent Due November 3rd 2045 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
[2] |
Nov. 03, 2045
|
|
Nov. 03, 2045
|
|
| Face Value |
[2] |
$ 3,000
|
|
|
[1] |
| Stated Interest Rate |
[2] |
4.45%
|
|
4.45%
|
|
| Effective Interest Rate |
[2] |
4.492%
|
|
4.492%
|
|
| Notes 4.0 Percent Due February 12th 2055 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
|
Feb. 12, 2055
|
|
Feb. 12, 2055
|
|
| Face Value |
|
$ 2,250
|
|
$ 2,250
|
|
| Stated Interest Rate |
|
4.00%
|
|
4.00%
|
|
| Effective Interest Rate |
|
4.063%
|
|
4.063%
|
|
| Notes 4.75 Percent Due November 3rd 2055 |
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
| Debt maturity date |
[2] |
Nov. 03, 2055
|
|
Nov. 03, 2055
|
|
| Face Value |
[2] |
$ 1,000
|
|
|
[1] |
| Stated Interest Rate |
[2] |
4.75%
|
|
4.75%
|
|
| Effective Interest Rate |
[2] |
4.782%
|
|
4.782%
|
|
|
|