Fair Value - Textual (Details) - USD ($)	Mar. 10, 2017	Dec. 05, 2016	Sep. 23, 2016	Dec. 14, 2015	Jun. 03, 2013	Apr. 29, 2017	Oct. 29, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and held to maturity investments						$ 1,921,800,000	$ 252,500,000
Principal						12,950,000,000	1,750,000,000
Frequency of periodic payment		semi-annual fixed interest payments due on June 5 and December 5 of each year, commencing June 5, 2017
2.5% Senior unsecured notes due December 5, 2021 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal		$ 400,000,000
Interest rate (as percent)		2.50%
3.125% Senior unsecured notes due December 5, 2023 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal		$ 550,000,000
Interest rate (as percent)		3.125%
3.5% Senior unsecured notes due December 5, 2026 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal		$ 900,000,000
Interest rate (as percent)		3.50%
4.5% Senior unsecured notes due December 5, 2036 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal		$ 250,000,000
Interest rate (as percent)		4.50%
Bridge Loan [Member] | 90-day Bridge Credit Agreement Due June 8, 2017 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt term	90 days
90-day senior unsecured bridge facility maximum aggregate principal amount	$ 4,100,000,000.0
Unsecured debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt term	5 years
Unsecured debt [Member] | 3-Year Term Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt term	3 years		3 years
3-year unsecured term loan facility principal amount			$ 2,500,000,000.0
Unsecured debt [Member] | 5-Year Term Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt term	5 years		5 years
5-year unsecured term loan facility principal amount			$ 2,500,000,000.0
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Frequency of periodic payment				semi-annual fixed interest payments due on June 15 and December 15 of each year, commencing June 15, 2016
Level 1 [Member] | 2.875% Senior unsecured notes due June 1, 2023 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Frequency of periodic payment					semi-annual fixed interest payments due on June 1 and December 1 of each year, commencing December 1, 2013
Level 1 [Member] | Financial instruments not recorded at fair value on a recurring basis [Member] | 2.875% Senior unsecured notes due June 1, 2023 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal					$ 500,000,000
Interest rate (as percent)					2.875%
Fair value of the long-term debt						496,300,000	501,300,000
Level 1 [Member] | Financial instruments not recorded at fair value on a recurring basis [Member] | 3.9% Senior unsecured notes due December 15, 2025 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal				$ 850,000,000
Interest rate (as percent)				3.90%
Fair value of the long-term debt						878,300,000	901,500,000
Level 1 [Member] | Financial instruments not recorded at fair value on a recurring basis [Member] | 5.3% Senior unsecured notes due December 15, 2045 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal				$ 400,000,000
Interest rate (as percent)				5.30%
Fair value of the long-term debt						447,700,000	$ 425,100,000
Level 1 [Member] | Financial instruments not recorded at fair value on a recurring basis [Member] | 2.5% Senior unsecured notes due December 5, 2021 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate (as percent)		2.50%
Fair value of the long-term debt						399,500,000
Level 1 [Member] | Financial instruments not recorded at fair value on a recurring basis [Member] | 3.125% Senior unsecured notes due December 5, 2023 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate (as percent)		3.125%
Fair value of the long-term debt						553,100,000
Level 1 [Member] | Financial instruments not recorded at fair value on a recurring basis [Member] | 3.5% Senior unsecured notes due December 5, 2026 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate (as percent)		3.50%
Fair value of the long-term debt						900,000,000
Level 1 [Member] | Financial instruments not recorded at fair value on a recurring basis [Member] | 4.5% Senior unsecured notes due December 5, 2036 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate (as percent)		4.50%
Fair value of the long-term debt						$ 252,300,000