Long-term Debt (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Dec. 31, 2013		Jun. 30, 2013
Debt Instrument [Line Items]
Face Value	$ 22,781		$ 15,665
Notes 0.875 Percent Due September 27th 2013
Debt Instrument [Line Items]
Debt maturity date	Sep. 27, 2013		Sep. 27, 2013
Face Value		[1]	1,000
Stated Interest Rate	0.875%		0.875%
Effective Interest Rate	1.00%		1.00%
Notes 2.95 Percent Due June 1st 2014
Debt Instrument [Line Items]
Debt maturity date	Jun. 01, 2014		Jun. 01, 2014
Face Value	2,000		2,000
Stated Interest Rate	2.95%		2.95%
Effective Interest Rate	3.049%		3.049%
Notes 1.625 Percent Due September 25th 2015
Debt Instrument [Line Items]
Debt maturity date	Sep. 25, 2015		Sep. 25, 2015
Face Value	1,750		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	750		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 1.625 Percent Due December 6th 2018
Debt Instrument [Line Items]
Debt maturity date	Dec. 06, 2018	[2]	Dec. 06, 2018	[2]
Face Value	1,250	[2]		[1],[2]
Stated Interest Rate	1.625%	[2]	1.625%	[2]
Effective Interest Rate	1.824%	[2]	1.824%	[2]
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 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 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	Dec. 06, 2021	[3]	Dec. 06, 2021	[3]
Face Value	2,412	[3]		[1],[3]
Stated Interest Rate	2.125%	[3]	2.125%	[3]
Effective Interest Rate	2.233%	[3]	2.233%	[3]
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	[2]	Dec. 15, 2023	[2]
Face Value	1,500	[2]		[1],[2]
Stated Interest Rate	3.625%	[2]	3.625%	[2]
Effective Interest Rate	3.726%	[2]	3.726%	[2]
Notes 3.125 Percent Due December 6 2028
Debt Instrument [Line Items]
Debt maturity date	Dec. 06, 2028	[3]	Dec. 06, 2028	[3]
Face Value	2,412	[3]		[1],[3]
Stated Interest Rate	3.125%	[3]	3.125%	[3]
Effective Interest Rate	3.218%	[3]	3.218%	[3]
Notes 2.625 Percent Due May 2nd 2033
Debt Instrument [Line Items]
Debt maturity date	May 02, 2033	[4]	May 02, 2033	[4]
Face Value	757	[4]	715	[4]
Stated Interest Rate	2.625%	[4]	2.625%	[4]
Effective Interest Rate	2.69%	[4]	2.69%	[4]
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	[2]	Dec. 15, 2043	[2]
Face Value	$ 500	[2]		[1],[2]
Stated Interest Rate	4.875%	[2]	4.875%	[2]
Effective Interest Rate	4.918%	[2]	4.918%	[2]

[1] Not applicable.

[2] In December 2013, we issued $3.3 billion of debt securities.

[3] In December 2013, we issued €3.5 billion of debt securities.

[4] In April 2013, we issued €550 million of debt securities.