Supplemental Guarantor Information - Narrative (Details) - Senior notes - USD ($)	Jul. 07, 2016	May 03, 2012
Debt Instrument [Line Items]
Debt instrument, face amount		$ 1,900,000,000
Parent Issuer | Senior Notes Due 2017 $300M 2.0%
Debt Instrument [Line Items]
Debt instrument, face amount		$ 300,000,000
Debt instrument, stated interest rate		2.00%
Parent Issuer | Senior Notes Due 2022 $500M 3.5%
Debt Instrument [Line Items]
Debt instrument, face amount		$ 500,000,000
Debt instrument, stated interest rate		3.50%
Parent Issuer | Senior Notes Due 2042 $1.1B 5.0%
Debt Instrument [Line Items]
Debt instrument, face amount		$ 1,100,000,000
Debt instrument, stated interest rate		5.00%
Parent Issuer | Senior Notes Due 2019 $500M 1.45%
Debt Instrument [Line Items]
Debt instrument, face amount	$ 500,000,000
Debt instrument, stated interest rate	1.45%
Parent Issuer | Senior Notes Due 2021 $1B 2.1%
Debt Instrument [Line Items]
Debt instrument, face amount	$ 1,000,000,000.0
Debt instrument, stated interest rate	2.10%
Parent Issuer | Senior Notes Due 2026 $2B 3.0%
Debt Instrument [Line Items]
Debt instrument, face amount	$ 2,000,000,000.0
Debt instrument, stated interest rate	3.00%
Parent Issuer | Senior Notes Due 2046 $1.8B 4.2%
Debt Instrument [Line Items]
Debt instrument, face amount	$ 1,800,000,000
Debt instrument, stated interest rate	4.20%
Parent Issuer | Senior Notes Due 2024 EUR800M 1.25%
Debt Instrument [Line Items]
Debt instrument, face amount	$ 800,000,000.0
Debt instrument, stated interest rate	1.25%